iPad app force closes when starting a video

I’m trying to access file on my Synology NAS. I have tried various way. FTP, SFTP, Webdav.

I can successfully add Movies, TV Shows etc to the app, and all seems ok - Metadata etc is looking good, but when I go to play a video, the screen goes to the video playback screen, initially says “loading”, then the timeline showing how far long the video is, showing 0:00 to 1:45 or similar, then the app force closes.

Anyone have any suggestions?

EDIT

Further testing shows me that I can download a TV episode, but when I go to play, the file begins playing, but the app force closes again, maybe 3 or 4 seconds into playback.

Is this happening with all videos, or just this one?

If you have a chance to send in a report from your device we can look further into what is going on.