Certain .tiff and .tif images cannot be viewed - "Unable to load photo"

Server Version#: 1.32.8.7639
Player Version#: 1.82.2.4024-64f483f6

I have well over 100 .tif and .tiff image files that Plex will not display. I get this message from the Plex Windows desktop app when attempting to view these images:

image

I am unsure whether this issue is rooted with the server, or the client app. I mostly use Windows desktop apps, and the server in question resides on a QNAP TS-453D NAS. All software is fully updated. Performing a search for this issue within Plex forums I found a few threads with similar complaints (I’m on a few of them) but no resolution. There are some older posts talking about file size, and .TIF vs .TIFF extensions, but none of it yielded any results. The example above is under 4 MB so it’s clearly not file size related. I have noted that most, possibly all images in question are 16 bit color depth and uncompressed, labeled as RAW by MediaInfo, but definitely .tif/.tiff format, Those files are all generated using astro photography imaging software AstroSurface.

Here is typical MediaInfo data for one of these image files.

General
Count : 	349
Count of stream of this kind : 	1
Kind of stream : 	General
Kind of stream : 	General
Stream identifier : 	0
Inform : 	Count : 349 Count of stream of this kind : 1 Kind of stream : General Kind of stream : General Stream identifier : 0 Inform : Count : 349 / Count of stream of this kind : 1 / Kind of stream : General / Kind of stream : General / Stream identifier : 0 / Inform : TIFF: 3.45 MiB / Count of image streams : 1 / Image_Format_List : Raw / Image_Format_WithHint_List : Raw / Codecs Image : Raw / Complete name : L:\Telescope & Sky\Moon\pipp_20231110_003900\Aligned\Da Moon PART II_1_pipp_100r_112T_42reg_PROCESSED.tiff / Folder name : L:\Telescope & Sky\Moon\pipp_20231110_003900\Aligned / File name extension : Da Moon PART II_1_pipp_100r_112T_42reg_PROCESSED.tiff / File name : Da Moon PART II_1_pipp_100r_112T_42reg_PROCESSED / File extension : tiff / Format : TIFF / Format : TIFF / Format/Extensions usually used : tiff tif / Commercial name : TIFF / Internet media type : image/tiff / File size : 3615458 / File size : 3.45 MiB / File size : 3 MiB / File size : 3.4 MiB / File size : 3.45 MiB / File size : 3.448 MiB / File creation date : 2023-11-10 07:57:17.936 UTC / File creation date (local) : 2023-11-10 01:57:17.936 / File last modification date : 2023-11-10 07:57:18.321 UTC / File last modification date (local) : 2023-11-10 01:57:18.321 Count of image streams : 1 Image_Format_List : Raw Image_Format_WithHint_List : Raw Codecs Image : Raw Complete name : L:\Telescope & Sky\Moon\pipp_20231110_003900\Aligned\Da Moon PART II_1_pipp_100r_112T_42reg_PROCESSED.tiff Folder name : L:\Telescope & Sky\Moon\pipp_20231110_003900\Aligned File name extension : Da Moon PART II_1_pipp_100r_112T_42reg_PROCESSED.tiff File name : Da Moon PART II_1_pipp_100r_112T_42reg_PROCESSED File extension : tiff Format : TIFF Format : TIFF Format/Extensions usually used : tiff tif Commercial name : TIFF Internet media type : image/tiff File size : 3615458 File size : 3.45 MiB File size : 3 MiB File size : 3.4 MiB File size : 3.45 MiB File size : 3.448 MiB File creation date : 2023-11-10 07:57:17.936 UTC File creation date (local) : 2023-11-10 01:57:17.936 File last modification date : 2023-11-10 07:57:18.321 UTC File last modification date (local) : 2023-11-10 01:57:18.321
Count of image streams : 	1
Image_Format_List : 	Raw
Image_Format_WithHint_List : 	Raw
Codecs Image : 	Raw
Complete name : 	L:\Telescope & Sky\Moon\pipp_20231110_003900\Aligned\Da Moon PART II_1_pipp_100r_112T_42reg_PROCESSED.tiff
Folder name : 	L:\Telescope & Sky\Moon\pipp_20231110_003900\Aligned
File name extension : 	Da Moon PART II_1_pipp_100r_112T_42reg_PROCESSED.tiff
File name : 	Da Moon PART II_1_pipp_100r_112T_42reg_PROCESSED
File extension : 	tiff
Format : 	TIFF
Format : 	TIFF
Format/Extensions usually used : 	tiff tif
Commercial name : 	TIFF
Internet media type : 	image/tiff
File size : 	3615458
File size : 	3.45 MiB
File size : 	3 MiB
File size : 	3.4 MiB
File size : 	3.45 MiB
File size : 	3.448 MiB
File creation date : 	2023-11-10 07:57:17.936 UTC
File creation date (local) : 	2023-11-10 01:57:17.936
File last modification date : 	2023-11-10 07:57:18.321 UTC
File last modification date (local) : 	2023-11-10 01:57:18.321

Image
Count : 	124
Count of stream of this kind : 	1
Kind of stream : 	Image
Kind of stream : 	Image
Stream identifier : 	0
Format : 	Raw
Format : 	Raw
Commercial name : 	Raw
Format settings, Endianness : 	Little
Format settings : 	Little
Width : 	1380
Width : 	1 380 pixels
Height : 	1308
Height : 	1 308 pixels
Color space : 	Y
Bit depth : 	16
Bit depth : 	16 bits
Compression mode : 	Lossless
Compression mode : 	Lossless

Windows happily interacts with all of these files, giving me preview thumbnails in Explorer, and being recognized by all relevant Windows apps as valid image files.

Anyone else run into this issue? If it’s all a bridge too far for Plex I will have to find another photo viewing solution, which of course won’t be integrated into Plex, which is what I use for every other type of media that I own. Thanks in advance for any help!

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