I'm currently always applying low effect, medium resolution and texture, also max fps.
But after a few minutes the game put an alert said " the graphics is adjusted automatically to ensure blah blah ~ " and adjusting my graphic to maximum settings ( except for the fps was set to 30 ).
Its really annoying especially when I was in the middle of pvp / guild war. Face to face with enemies and suddenly the alert appear !!
How to disable it ?!

I'm with you 100%

I send a bug report about this abhorrent behavior regularly, they're apparently in denial.

It changes my settings from "low" to "high" and they falsely claim it's because my phone is overheating (it's not) or dropping frames (impossible with 'maximum frame rate possible'). What it does is not only interrupt gameplay but it changes the settings from "low" to "high" for the absolute worst performance possible!