UE 5.2.1 The Editor UI content changed its size suddenly

I was working in my Unreal project and everything looked fine, until I opened up my project again. And out of no where the Editor UI scale got suddenly changed:

I have looked in some other settings, but some how only the content inside the editors, like fonts and thumbnail got changed in size. If i go in some other sections like settings and plugins, etc. The UI looks normal. Any idea where the problem lies?