Hello! I m working for 3 years with ue4 and I never saw something like this, I m struggle with this problem for 3 weeks now. The engine works great for like 3-4-5 minutes, in some cases about 10 minutes, after that, the thing you can see in the video is happening (The nodes list just disappear when I m trying to chose an option, the top panels same, disappears when I m trying to use them. Every expandable menu just disappears after shows for like 0.2 seconds), I don t really know why. Probably is a bug, an issue, or something like that.
I was trying to record the screen with NVIDIA recording software (instead of phone) but the problem wasn’t there anymore.
While I’m recording, all works perfectly, when the recording is stopped/paused, the problem appears again, very strange…
Koljisto posted an answer in this thread Submenus Disappearing Bug - UI - Unreal Engine Forums which might be a short term solution. It could also be a driver issue. Did you install a new GPU driver before those problems occured? Did you try to disable Nvidia Shadow Play before starting Unreal? Maybe try to install the newest Nvidia driver (or one from a date before your problems) .