Very low FPS after the window is moved in the editor

Very low FPS after the window is moved in the editor.
See pictures in attache. How to avoid it?
For example, if I want to host some Windows for output on the second monitor.
Windows 10 Home, Intel Core i7-6700, GeForce GTX 1070, 16 ГБ DDR4-2133 DDR4 SDRAM

Hi Dobrodukh,

I have not been able to reproduce this. Can you provide more detailed repro steps?

Are you able to reproduce this in a Blank Template that we can simulate here?

Did you ever use a previous version of UE4 and, if so, did the issue occur in that version (ie. is this a regression?)

Please provide this information and we will continue to investigate.



Strange problem. A strong drop in FPS and the speed of the editor, observed if you move the cursor anywhere in the interface where there is a hint.!
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The way around the fps drop is to dock the window in the very top of the screen. Like when you have tabs open in a web browser. You can also go into the editor preferences>general>misc>performance and turn off the “use less cpu when in background” option.