Bug #3286

Fullscreen mode flickers, stutters, and unexpected window mode toggles on Enter key press

Status:	Open
Priority:	High
Added by:	VioletError on May 7, '26
Assigned to:	Unassigned
Due date:
Reported for:	9.6.1
Actual Result:	switching between screen modes cause further issues unless done in a specific way
Expected Result:	switching between screen modes
Severity:	Unknown
Reproducibility:	Frequently
Platform:	Steam
Additional Notes & Comments:	I have never encountered this issue before, it only started after I accidently pressed enter and switched to windowed mode. Before then, I had never had any tabbing issues, not even the brief black flicker, tabbing and clicking to the 2nd monitor was smooth. Note that I do have an AMD processor. This issue occurs both in the standard 9.6.1 and the 9.6.1 gpu hotfix. Note than in the videos, when it switched to the windowed mode, I only pressed Enter.

Steps to Reproduce

1. press Enter (may or may not cause it to switch to windowed mode - If it doesn't occur, then just do Alt + Enter to progress to the other issue)
2. press Alt + Enter (this should fullscreen it, after which will cause issues when tabbing out)
3. press Enter (or Alt + Enter if Enter alone isn't causing it to switch)
4. press the maximize window button to go to windowed fullscreen
5. press Alt + Enter to go to fullscreen (after this it shouldn't cause the same tabbing out issues other than the flicker/stutter)

Explanation

When in fullscreen mode, tabbing out/clicking out of the game causes a black flicker and the game to briefly stutter.

However, what's worse is that sometimes pressing enter causes the game to switch to windowed mode as if I had done Alt + Enter, despite only the enter key being pressed (I have tested to make sure the Alt key is not getting input - it's not). Pressing Enter only sometimes causes this.

After it's switched to windowed mode, once I've hit the Alt + Enter shortcut and then switched to fullscreen, after this point, the game gets quite buggy. The cursor can no longer move between monitors, and tabbing causes the game to go black, then shrink as if it were in window mode. Clicking back to focus reverts back to the proper size (while lagging). This whole process also causes the desktop icons to move (note that I have 2 monitors).

What's even weirder is that after the game goes to windowed mode after hitting enter, rather than switching back to fullscreen with the Alt + Enter shortcut, if I instead click the maximize icon next to the X, and then press Alt + Enter to fullscreen, the game seems to "fix" itself. The cursor can now go between monitors again, and tabbing out now only causes the brief black flicker (the issues from the first paragraph).

Everything other than Enter acting like Alt + Enter, was something that I could consistently reproduce. As for the issues with Enter acting like Alt + Enter, I'm not sure what triggers it. I've had it happen when in the main menu, the 2v8 character select, and while ingame, while getting moried. As I've stated, my Alt key seems fine. I've repeatedly checked the keyboard input, and nothing seems wrong.

These issues occur after restarting my game and computer.

Watchers

Watch