There is an existing thread on the subject. Some users reported the problem fixed in version 9.4. However, I do not see it mentioned in the release notes for 9.4 or later.
I can also confirm on a FireTV Stick and FireTV Cube on 9.4, the problem appears to be gone. Previously, it was crashing every time (or nearly every time) and I played 10 prerolls in a row without issues on the new version.
Plex for Android 9.4.0
Available on Google Play and the Amazon App Store .
NOTE: We are performing a staged rollout, which means the update may take a day or two before it becomes available.
WHATS NEW:
[Mobile] Profile: user can access friend requests directly from their profile.
FIXES:
Player: prevent crash when selecting auto-convert.
Content of Watchlist tab was sometimes not updated after switching users.
Player: improve reliability of track selection when software-decoded tracks are …