www.makemkv.com

All files were created using makemkv. All files have mkv extensions. Plex lists some as MKV and some as M2TS. The M2TS won't play. I don't think that the Sony Blu-ray player supports M2TS. Could newer version of makemkv have introduced a bug?

Streaming using Plex server, my Sony S5100 Blu-ray player accessing Plex is not playing some MKV titles which Plex lists as a M2TS file. The files are .mkv and play locally on the PC but I need to play them via the Blu-ray player. Why would a MKV file be mistaken for M2TS?