I’ve formated PC, reverted Driver updates but nothing helped.
I keep getting this crash on UEFN, screen goes black and if i reopen UEFN without restarting PC the whole PC shuts down… If it helps I think it happens mostly when I alt tab or change windows.
I got the logs saved but I don’t know where to send them.
This only happens with UEFN.
RX 6600
Ryzen 5 5600
32gb ram
Windows 11 25H2
Hope someone can help me or that this can be fixed because its impossible to use UEFN like this.
Please select what you are reporting on:
Unreal Editor for Fortnite
What Type of Bug are you experiencing?
Stability
Steps to Reproduce
Open UEFN, use it, eventually it will crash. Seems to happen the most when you have Fortnite open and you keep altering between Fortnite and UEFN window.
Expected Result
It shouldn’t crash, you should be able to swap between apps without any problem.
Observed Result
Screen goes black, when it comes back crash report says Assertion failed: (::DwmExtendFrameIntoClientArea(HWnd, &Margins)) >= 0 File: WindowsWindow.cpp Line: 359, then, if I don’t restart my PC, the whole pc will shut down if I reopen UEFN.
Platform(s)
PC
Additional Notes
I saw another person with this issue last month on this forum but he didn’t get any reply.
Hi, I will keep you all updated as I find more stuff, this seems to happen way easier if you select an object on UEFN before alt tabing to Fortnite. Also it seems theres times it will crash when u alt tab to Fortnite even without UEFN. This crash doesn’t happen when alt tabing to other heavy games even if I select an object on UEFN before. Also logs here.
Ok so like, maybe clicking an object was just a coincidence, but it crashes >> 100% << of the times I click to Cancel memory calculation and return to Fortnite, there haven’t been a time it didn’t crash like that.
It feels easier to crash when you select an object / cancel a mem calc / Fortnite is on a loading screen before switching from UEFN to Fortnite. But it feels random, I can’t really find a way to force crash the game. Loading screen one seems to be the easier way tho.
This only happens when Windows 11 Transparency effects are On! Disabling it stop the crashes but this should be looked at, a lot of people probably have it on.
