Again, it has nothing to do with the server, it's the client. Downgrade to 6.12 and save yourself from the frustration.
If you want to help folks - and Android Folks on AFTVs need some help, for sure - don't just suggest they downgrade, also include all the links/instructions for downgrading - because MOST regular Joes (Most Plex Users) don't have any idea how to do that (I don't, for instance, and I'm one of Plex's Power Users, so they say).
Make a few browser bookmarks to the appropriate threads/instructions/materials - then just copy and paste those helpful links so Plex Users In Crisis (Plex Android Victims) can help themselves...
The easier you make it for Victims to help themselves, the higher your standing on the Plex Heroes List. If you're going to be Plex's Volunteer Support Staff (Plex's only reliable support) - be a good one...
I didn't get all those 'Answers' by suggesting people do things - without telling them exactly how to do it... I have tons of Plex Related Emergency Work-Arounds and Solutions Bookmarks ready to go at all times - and as soon as you provide all the info... I'll set a few more Bookmarks, so I can help you, help them/us.
It's easy to suggest Wars kill a lot people, so we should stop them.
It's a lot harder to actually stop them - without specific instructions.