There is a white clover in my phone screen and I cant remove it. Help!

A

AC Question

Hello today I was in my phone and out of nowhere this type of white clover started to appear on my phone screen, I tried to turn off and turn on again my phone but when I do that, after 5 minutes it appears again. When I click in it it says:
Sucessfully Released (for example) 60MB.
This is pretty annoying because it never goes away. If this has occurred to any of you and you have any way to fix it please help me. Thanks
 

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