I dug through a log and found what I believe to be a pertinent section here:
Apr 17, 2019 22:20:47.514 [11356] DEBUG - Content-Length of G:\Official Music Library\Music\Harry Nilsson\All Time Greatest Hits\14 Jump Into the Fire.mp3 is 2837504.
Apr 17, 2019 22:20:47.514 [8808] DEBUG - Completed: [192.168.1.112:58199] 200 GET /:/timeline?ratingKey=39364&key=%2Flibrary%2Fmetadata%2F39364&playbackTime=5873&playQueueItemID=27594&state=playing&hasMDE=1&time=0&duration=177000 (11 live) TLS GZIP 51ms 543 bytes (pipelined: 10)
Apr 17, 2019 22:20:47.514 [13704] DEBUG - Request: [192.168.1.112:58201 (Subnet)] GET /status/sessions (11 live) TLS GZIP Signed-in Token (djcubez*****)
Apr 17, 2019 22:20:47.515 [13704] DEBUG - [Now] Adding 2 sessions.
Apr 17, 2019 22:20:47.517 [8808] DEBUG - Completed: [192.168.1.112:58201] 200 GET /status/sessions (11 live) TLS GZIP 3ms 1899 bytes (pipelined: 4)
Apr 17, 2019 22:20:47.521 [8808] DEBUG - Auth: authenticated user 1 as djcubez*****
Apr 17, 2019 22:20:47.522 [9576] DEBUG - Request: [192.168.1.112:58201 (Subnet)] GET /playQueues/328?repeat=0&own=1&includeChapters=1&includeGeolocation=1&includeExternalMedia=1 (11 live) TLS GZIP Signed-in Token (djcubez*****)
Apr 17, 2019 22:20:47.523 [9576] DEBUG - PlayQueue: total generated: 59612, before cursor: 100, after cursor: 99
Apr 17, 2019 22:20:47.523 [9576] DEBUG - PlayQueue: No need to refresh, active window is operational.
Apr 17, 2019 22:20:47.543 [9576] DEBUG - It took 62.500000 ms to retrieve 41 items.
Apr 17, 2019 22:20:47.553 [9576] DEBUG - PlayQueue: Client 9xvw15jptdoope4rphegsbux requested ownership of play queue 328, but already had it.
Apr 17, 2019 22:20:47.559 [9576] DEBUG - We're going to try to auto-select an audio stream for account 1.
Apr 17, 2019 22:20:47.559 [9576] DEBUG - Selecting best audio stream for part ID 30094 (autoselect: 1 language: en)
Apr 17, 2019 22:20:47.559 [9576] DEBUG - We're going to try to auto-select a subtitle.
Apr 17, 2019 22:20:47.559 [9576] DEBUG - Audio Stream: 64812, Subtitle Stream: -1
Apr 17, 2019 22:20:47.560 [9576] DEBUG - We're going to try to auto-select an audio stream for account 1.
Apr 17, 2019 22:20:47.560 [9576] DEBUG - Selecting best audio stream for part ID 30092 (autoselect: 1 language: en)
Apr 17, 2019 22:20:47.560 [9576] DEBUG - We're going to try to auto-select a subtitle.
Apr 17, 2019 22:20:47.560 [9576] DEBUG - Audio Stream: 65428, Subtitle Stream: -1
Apr 17, 2019 22:20:47.561 [9576] DEBUG - We're going to try to auto-select an audio stream for account 1.
Apr 17, 2019 22:20:47.561 [9576] DEBUG - Selecting best audio stream for part ID 30091 (autoselect: 1 language: en)
Apr 17, 2019 22:20:47.561 [9576] DEBUG - We're going to try to auto-select a subtitle.
Apr 17, 2019 22:20:47.561 [9576] DEBUG - Audio Stream: 57050, Subtitle Stream: -1
Apr 17, 2019 22:20:47.562 [9576] DEBUG - We're going to try to auto-select an audio stream for account 1.
Apr 17, 2019 22:20:47.562 [9576] DEBUG - Selecting best audio stream for part ID 37147 (autoselect: 1 language: en)
Apr 17, 2019 22:20:47.562 [9576] DEBUG - We're going to try to auto-select a subtitle.
Apr 17, 2019 22:20:47.562 [9576] DEBUG - Audio Stream: 68018, Subtitle Stream: -1
Apr 17, 2019 22:20:47.563 [9576] DEBUG - We're going to try to auto-select an audio stream for account 1.
Apr 17, 2019 22:20:47.563 [9576] DEBUG - Selecting best audio stream for part ID 37145 (autoselect: 1 language: en)
Apr 17, 2019 22:20:47.563 [9576] DEBUG - We're going to try to auto-select a subtitle.
Apr 17, 2019 22:20:47.563 [9576] DEBUG - Audio Stream: 80548, Subtitle Stream: -1
Apr 17, 2019 22:20:47.564 [9576] DEBUG - We're going to try to auto-select an audio stream for account 1.
Apr 17, 2019 22:20:47.564 [9576] DEBUG - Selecting best audio stream for part ID 37146 (autoselect: 1 language: en)
Apr 17, 2019 22:20:47.564 [9576] DEBUG - We're going to try to auto-select a subtitle.
Apr 17, 2019 22:20:47.564 [9576] DEBUG - Audio Stream: 62219, Subtitle Stream: -1
Apr 17, 2019 22:20:47.567 [9576] DEBUG - We're going to try to auto-select an audio stream for account 1.
Apr 17, 2019 22:20:47.567 [9576] DEBUG - Selecting best audio stream for part ID 30077 (autoselect: 1 language: en)
Apr 17, 2019 22:20:47.567 [9576] DEBUG - We're going to try to auto-select a subtitle.
Apr 17, 2019 22:20:47.567 [9576] DEBUG - Audio Stream: 64219, Subtitle Stream: -1
Apr 17, 2019 22:20:47.568 [9576] DEBUG - We're going to try to auto-select an audio stream for account 1.
Apr 17, 2019 22:20:47.568 [9576] DEBUG - Selecting best audio stream for part ID 30079 (autoselect: 1 language: en)
Apr 17, 2019 22:20:47.568 [9576] DEBUG - We're going to try to auto-select a subtitle.
Apr 17, 2019 22:20:47.568 [9576] DEBUG - Audio Stream: 62503, Subtitle Stream: -1
Apr 17, 2019 22:20:47.569 [9576] DEBUG - We're going to try to auto-select an audio stream for account 1.
Apr 17, 2019 22:20:47.569 [9576] DEBUG - Selecting best audio stream for part ID 30080 (autoselect: 1 language: en)
Apr 17, 2019 22:20:47.569 [9576] DEBUG - We're going to try to auto-select a subtitle.
Apr 17, 2019 22:20:47.569 [9576] DEBUG - Audio Stream: 59705, Subtitle Stream: -1
Apr 17, 2019 22:20:47.569 [9576] DEBUG - We're going to try to auto-select an audio stream for account 1.
Apr 17, 2019 22:20:47.569 [9576] DEBUG - Selecting best audio stream for part ID 30081 (autoselect: 1 language: en)
Apr 17, 2019 22:20:47.570 [9576] DEBUG - We're going to try to auto-select a subtitle.
Apr 17, 2019 22:20:47.570 [9576] DEBUG - Audio Stream: 68693, Subtitle Stream: -1
Apr 17, 2019 22:20:47.571 [9576] DEBUG - We're going to try to auto-select an audio stream for account 1.
Apr 17, 2019 22:20:47.571 [9576] DEBUG - Selecting best audio stream for part ID 30084 (autoselect: 1 language: en)
Apr 17, 2019 22:20:47.571 [9576] DEBUG - We're going to try to auto-select a subtitle.
Apr 17, 2019 22:20:47.571 [9576] DEBUG - Audio Stream: 55975, Subtitle Stream: -1
Apr 17, 2019 22:20:47.571 [9576] DEBUG - We're going to try to auto-select an audio stream for account 1.
Apr 17, 2019 22:20:47.571 [9576] DEBUG - Selecting best audio stream for part ID 30051 (autoselect: 1 language: en)
Apr 17, 2019 22:20:47.572 [9576] DEBUG - We're going to try to auto-select a subtitle.
Apr 17, 2019 22:20:47.572 [9576] DEBUG - Audio Stream: 59742, Subtitle Stream: -1
Apr 17, 2019 22:20:47.572 [9576] DEBUG - We're going to try to auto-select an audio stream for account 1.
Apr 17, 2019 22:20:47.572 [9576] DEBUG - Selecting best audio stream for part ID 30052 (autoselect: 1 language: en)
Apr 17, 2019 22:20:47.573 [9576] DEBUG - We're going to try to auto-select a subtitle.
Apr 17, 2019 22:20:47.573 [9576] DEBUG - Audio Stream: 78652, Subtitle Stream: -1
Apr 17, 2019 22:20:47.573 [9576] DEBUG - We're going to try to auto-select an audio stream for account 1.
Apr 17, 2019 22:20:47.573 [9576] DEBUG - Selecting best audio stream for part ID 30053 (autoselect: 1 language: en)
Apr 17, 2019 22:20:47.574 [9576] DEBUG - We're going to try to auto-select a subtitle.
Apr 17, 2019 22:20:47.574 [9576] DEBUG - Audio Stream: 63782, Subtitle Stream: -1
Apr 17, 2019 22:20:47.575 [9576] DEBUG - We're going to try to auto-select an audio stream for account 1.
Apr 17, 2019 22:20:47.575 [9576] DEBUG - Selecting best audio stream for part ID 30054 (autoselect: 1 language: en)
Apr 17, 2019 22:20:47.575 [9576] DEBUG - We're going to try to auto-select a subtitle.
Apr 17, 2019 22:20:47.575 [9576] DEBUG - Audio Stream: 69407, Subtitle Stream: -1
Apr 17, 2019 22:20:47.575 [9576] DEBUG - We're going to try to auto-select an audio stream for account 1.
Apr 17, 2019 22:20:47.575 [9576] DEBUG - Selecting best audio stream for part ID 30055 (autoselect: 1 language: en)
Apr 17, 2019 22:20:47.576 [9576] DEBUG - We're going to try to auto-select a subtitle.
Apr 17, 2019 22:20:47.576 [9576] DEBUG - Audio Stream: 71688, Subtitle Stream: -1
Apr 17, 2019 22:20:47.582 [11800] DEBUG - Completed: [192.168.1.112:58201] 200 GET /playQueues/328?repeat=0&own=1&includeChapters=1&includeGeolocation=1&includeExternalMedia=1 (11 live) TLS GZIP 59ms 9137 bytes (pipelined: 5)
Apr 17, 2019 22:20:47.585 [11800] DEBUG - Completed: [192.168.1.112:58197] 200 GET /library/parts/37146/1541308302/file.mp3 (11 live) TLS 75ms 2837504 bytes (pipelined: 2) (range: bytes=0-)
Apr 17, 2019 22:20:50.488 [8808] DEBUG - Completed: [192.168.1.112:58097] -2 GET /player/proxy/poll?deviceClass=pc&protocolVersion=3&protocolCapabilities=timeline%2Cplayback%2Cnavigation%2Cmirror%2Cplayqueues&timeout=1 (11 live) TLS GZIP 20003ms 5 bytes (pipelined: 11)
Apr 17, 2019 22:20:50.493 [8808] DEBUG - Auth: authenticated user 1 as djcubez******
Apr 17, 2019 22:20:50.493 [11356] DEBUG - Request: [192.168.1.112:58097 (Subnet)] GET /player/proxy/poll?deviceClass=pc&protocolVersion=3&protocolCapabilities=timeline%2Cplayback%2Cnavigation%2Cmirror%2Cplayqueues&timeout=1 (11 live) TLS GZIP Signed-in Token (djcubez*******)
Apr 17, 2019 22:20:50.494 [11356] WARN - [CompanionPlayer] We already have a handler, overwriting.
Apr 17, 2019 22:20:50.706 [11800] DEBUG - Completed after connection close: [192.168.1.112:58192] 200 GET /library/sections/3/all?type=10&sort=artist.titleSort%2Calbum.titleSort%2Calbum.year%2Ctrack.absoluteIndex%2Ctrack.index%2Ctrack.titleSort%2Ctrack.id&includeRelated=1&includeCollections=1 (11 live) TLS GZIP Page 0-45232 11066ms 17 bytes (pipelined: 2)
Apr 17, 2019 22:20:53.715 [11528] DEBUG - It took 10156.250000 ms to retrieve 45243 items.
Apr 17, 2019 22:20:53.881 [11528] DEBUG - Setting container serialization range to [0, 45242] (total=59612)
Apr 17, 2019 22:20:57.460 [8808] DEBUG - Completed: [192.168.1.112:58193] 200 GET /library/sections/3/all?type=10&sort=artist.titleSort%2Calbum.titleSort%2Calbum.year%2Ctrack.absoluteIndex%2Ctrack.index%2Ctrack.titleSort%2Ctrack.id&includeRelated=1&includeCollections=1 (11 live) TLS GZIP Page 0-45242 10994ms 4027778 bytes (pipelined: 9)
Apr 17, 2019 22:21:01.484 [14240] DEBUG - BPQ: deferring onLibraryChanged callback, only 15 seconds since last library change
Apr 17, 2019 22:21:10.495 [8808] DEBUG - Completed: [192.168.1.112:58097] -2 GET /player/proxy/poll?deviceClass=pc&protocolVersion=3&protocolCapabilities=timeline%2Cplayback%2Cnavigation%2Cmirror%2Cplayqueues&timeout=1 (10 live) TLS GZIP 20002ms 5 bytes (pipelined: 12)
Apr 17, 2019 22:21:23.076 [14016] DEBUG - [CompanionProxy] player 9xvw15jptdoope4rphegsbux was last refreshed 10 seconds ago
Apr 17, 2019 22:21:33.077 [7308] DEBUG - [CompanionProxy] player 9xvw15jptdoope4rphegsbux was last refreshed 20 seconds ago
Apr 17, 2019 22:21:43.077 [11060] DEBUG - [CompanionProxy] player 9xvw15jptdoope4rphegsbux was last refreshed 30 seconds ago
Apr 17, 2019 22:21:46.484 [10756] DEBUG - BPQ: onConsiderProcessing: Idle (true)
Apr 17, 2019 22:21:46.484 [10756] DEBUG - BPQ: [Idle] -> [Processing]
Apr 17, 2019 22:21:46.485 [10756] DEBUG - BPQ: generating queue items from 0 generator(s)
Apr 17, 2019 22:21:46.486 [10756] DEBUG - BPQ: generated 0 item(s) for queue
Apr 17, 2019 22:21:46.486 [10756] DEBUG - PlayQueue: 0 generated IDs compressed down to a 2 byte blob.
Apr 17, 2019 22:21:46.486 [10756] DEBUG - PlayQueue: 0 generated IDs compressed down to a 2 byte blob.
Apr 17, 2019 22:21:46.486 [10756] DEBUG - BPQ: [Processing] -> [Idle]
Apr 17, 2019 22:21:53.068 [12076] DEBUG - [Now] Removing idle session for device qix7dnms8sngiqdmdoiaht3j_Track.
Apr 17, 2019 22:21:53.068 [12076] DEBUG - Statistics: (9xvw15jptdoope4rphegsbux) Reporting active playback in state 3 of type 10 (scrobble: 0) for account 1
Apr 17, 2019 22:21:53.078 [14240] DEBUG - [CompanionProxy] player 9xvw15jptdoope4rphegsbux was last refreshed 40 seconds ago
Apr 17, 2019 22:21:53.078 [14240] DEBUG - [CompanionProxy] player 9xvw15jptdoope4rphegsbux was not refreshed for over 30 seconds, dropping it.
Apr 17, 2019 22:21:53.854 [11512] DEBUG - Streaming Resource: Timing out session 0x4f74bd8:qix7dnms8sngiqdmdoiaht3j
Apr 17, 2019 22:21:53.854 [11512] DEBUG - Streaming Resource: Terminated session 0x4f74bd8:qix7dnms8sngiqdmdoiaht3j with reason Client stopped playback.
Apr 17, 2019 22:21:53.854 [11512] DEBUG - Streaming Resource: Removing session 0x4f74bd8:qix7dnms8sngiqdmdoiaht3j
Apr 17, 2019 22:22:02.217 [8808] DEBUG - WebSocket: client initiated close
Apr 17, 2019 22:22:02.218 [8808] DEBUG - handleStreamRead code 335544539: short read
Apr 17, 2019 22:22:02.218 [8808] DEBUG - NotificationStream: Removing because of error