Flashing and visible Mipmaps when Mipmap is off.

Put the summary of the bug you're having here
Flashing and visible Mipmap when its off.then if the Mipmap is on every thing is green and white for around 5 sec.ps my used keeps coming up to 50 then down to 20?
What I expected to happen was...:
Describe what you thought should happen here
it should be clear no flashing every sec and no Mipmap when off
What actually happened was...:
Describe what happened here
i just tested it and it is all bugged . ps i just have vanilla minecraft and mc is my favorite game
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
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