Client is not compatible and server is not sending a compatible format

[Stroller]

Ok I found something : 

-It is not working on some release using PGS. Not all, but some of them. Like I said previously it's about PGS files : 

Code:

[matroska,webm @ 0x558a7ab16600] Could not find codec parameters for stream 6 (Subtitle: hdmv_pgs_subtitle (pgssub)): unspecified size
Consider increasing the value for the 'analyzeduration' (50000000) and 'probesize' (5000000) options
[matroska,webm @ 0x558a7ab16600] Could not find codec parameters for stream 7 (Subtitle: hdmv_pgs_subtitle (pgssub)): unspecified size
Consider increasing the value for the 'analyzeduration' (50000000) and 'probesize' (5000000) options
[matroska,webm @ 0x558a7ab16600] Could not find codec parameters for stream 8 (Subtitle: hdmv_pgs_subtitle (pgssub)): unspecified size
Consider increasing the value for the 'analyzeduration' (50000000) and 'probesize' (5000000) options
Input #0, matroska,webm, from 'file:/mnt/media3/Films/Man of Steel (2013) MULTI VFF 2160p 10bit 4KLight HDR BluRay AAC 7.1 x265-QTZ.mkv':

So I increased probesize &  analyzeduration and it was still not working. Since it's say "unspecified size" for the PGS, is it a Jellyfin problem ? It's working on VLC. 
Should I open a GitHub ticket ?
Can I tell Jellyfin to skip PGS so it's doesnt try to transcode ? (temporary solution).

thx

- For the desktop app I can't force transcode on it even with uncheck "prefer fmp4 HLS". 
It is always direct playing. I selected "Hardware Decoding : Decode Enabled" it doesn't transcode, even with "Decode Copy". Still stuttering, then selected "Decode Disabled", no transcode but no stuttering. So the clue with the desktop app is a different matter.