Oppo 203 AVCHD playback fails for specific titles

[NoTalentClown]

Have ripped about 50 4k titles to a NAS.

~95% of them play fine exactly as if the disc were in the drive by putting everything in AVCHD folder.

However, two titles, Top Gun Maverick and Midway, result in the Oppo showing a blank screen and the display on the player is stuck at 00:00:00. Have extracted MKVs from the saved files and those play fine in the Oppo. Both discs play fine.

Any ideas?