Unreal Engine 4.18 Released!

I have a 4k monitor and just upgraded my project from 4.17 to 4.18. Now when I press ‘play in new editor window (pie)’ my window is all of a sudden much smaller than it was in 4.17. I’m using my mouse for touch events and those are now off as well. It looks like my input have an offset of 200 units in X and Z or something (I click on a grid of squares and a square far away from the mouse click gets the hit).

Now if I play in ‘mobile preview es2 (pie)’ things seem normal again.

Any idea why this is?

Thanks.

P.S I also noticed this is a problem when using widget reflector scaling in 4.17. I’m not using that in 4.18 nor 4.17 though as it seems buggy.