FPS getting lower ..and lower over Time

Well…its Everywhere… so i just have Grass thats Moving/trees/ Content Examples, but that wasnt a problem…

The Problem is just new… maybe from the 4.11.2 Update? or the new Graphical Driver… i dont know…

So i would guess its something Buggy?

I really have no Plan what it can be… or maybe the Dialogue BLueprint Content from marketplace? but i guess because its on the Marketplace its Optimized.

Any Ideas?

KS