eckerse, Jun 8, 2018 : Title In battery optimisation apps are getting automatically switched from 'not-optimised' to 'optimised' Device OnePlus3T Software Version O2 Stable 180517 Probablility of occurance 2_1%-10% Topic System Settings Photos Carrier/Network T-MobileO2 Actual behavior App is switched to optimised setting by system Was this a problem in previous software versions Yes This is a regression. Expected behavior App with setting 'not-optimised' should stay so. Any other comments I am not sure what triggers the symptom. Usually I use the app just to read preview inside android notification. It may happen for several days that I don't open the app itself. Seral apps that I use for push notifications like K9, Whatsapp automatically switch to 'optimised' from 'not-optimised' state. I use those apps for getting notifications on incoming messages/mails. After some time (usually days) those apps are switched automatically to optimised, effectively stopping synchronisation and notification on new messages.