Direct play not working on NVidia Shield Pro with 4K HDR video

Server Version#: 1.28.0.5998
Player Version#: Nvidia Shield Pro. Plex app v9.19.0.177

4K HDR video that won’t Direct Play on NVidia shield. Server and player are on the same LAN. The Shield plays lots of other 4K HDR videos… not sure what’s unique about this one.

When I try to play it, the player loads and I can see the video scrub bar across the bottom. But the video itself never starts playing. It just sits at 00:00:00 and makes no progress.

Attaching a brief clip to help with debugging.
ffmpeg -ss 0:00:00 -i [input] -t 0:00:13 -c copy sample.mp4
Sample.zip (14.7 MB)

Codec HEVC
Bitrate 14922 kbps
Language English
Language Tag en
Bit Depth 10
Chroma Location left
Chroma Subsampling 4:2:0
Coded Height 2080
Coded Width 3840
Color Primaries bt2020
Color Range tv
Color Space bt2020nc
Color Trc smpte2084
Frame Rate 23.976 fps
Height 2080
Level 5.0
Pixel Aspect Ratio 255:254
Profile main 10
Ref Frames 1
Width 3840
Display Title 4K HDR10 (HEVC Main 10)
Extended Display Title 4K HDR10 (HEVC Main 10)

Codec EAC3
Channels 6
Bitrate 766 kbps
Language English
Language Tag en
Audio Channel Layout 5.1(side)
Sampling Rate 48000 Hz
Display Title English (EAC3 5.1)
Extended Display Title English (EAC3 5.1)

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