I have the latest DEOVR version using quest 3 watching local files on my home network via DLNA. The problem still persists - even without leaving the app. So watch a movie, place it at minute 16:00, exit movie, come back and it starts from the beginning. My personal opinion is this is either a passive aggressive way to get us to stop using DLNA so that they won't have the same amount of backlash the last time they removed DLNA from DEOVR. Either that or their team is not trained in the most basic element of software development - test & fix existing functionality first before testing any new functionality.
It's one thing to say that DLNA will no longer be improved upon, but what reputable software company breaks existing and basic functionality of a streaming service, and doesn't take responsibility to fix it. Not many.