I was a tester for 0.16. I decided I wnted to play Realms so I left the BETA program. I uninstalled & reinstalled MCPE. When I tried to open MCPE it would not open. It only crashed. I checked the forums for this issue & found MANY people were having the same problem. They'd been in BETA & left to return to 1.15.9 with the saame results. No one seems to have any ideas or suggestions on how to fix this issue. It must be a bug.
MCPE-17288
Upon leaving BETA 0.16 & returning to 1.15.9 MCPE crashes
Resolved
Duplicate
0
(Unassigned)
Unconfirmed
Phone - Android - Samsung Other (Specify in description)
Android 4.4 (?)
0.15.9
Retrieved
Thank you for your report. This issue was, however, submitted earlier as MCPE-16817. Please perform a search next time to make sure your bug hasn't already been reported. The parent issue can easily be found by searching for "mcpe unresolved leave beta".