I have been working with 3 or 4 monitors for a very long time and just recently windows 10 updated (not sure if this was the cause or not) when this started happening. It drops below 10fps and unreal becomes unusable, the interface lags really badly.
If I type stat gpu in the editor it says Slate UI is taking anything between 20-200ms but as soon as I close all the extra windows and just have the main window it drops to 0.6ms.
I understand there is going to be some performance impact having more than one window open but it shouldn’t be this huge and never used to be a problem.
I’ve tried everything to fix this (including -DX12) but nothing helps, did anyone here solve the issue? It’s going to affect my productivity massively if I can’t fix it 