Help Android recent app 'slide up' gesture

[Its Frosty]

Hi, this is my first post on this website so play nice anyway, recently I've updated my android system and downloaded a few apps and games so I am unsure what causes this and I can't find anything about it since I don't know what it is called. A screenshot is attached for further clarification. If anyone could tell me how to disable it or what it's called it would be greatly appreciated. Thank you for your time

 

[sherri]

Looks like you have a launcher installed and have the animations set to "page turn" or something like that...

 

[Reddamper]

That gets installed with clean master. Under settings there is an option to stop clean master from making changes etc.