RN3 MTK hennessy , i come from 6.4.21 to 28.
Email app "AquaMail" crash when i open a mail, messenger "Threema" and "Signal" crash when i open a thread.
Dalvik and Cache wipe , no success.
App "Signal" remove and new install ,no success.
Now I'm back zu 6.4.21, all works fine.