[UI] Going from Windowed Mode to Fullscreen Mode ends up in a black screen

[Kherty]

Type: UI
Bug: Going from Windowed Mode to Fullscreen Mode ends up in a black screen and you can't do anything about it. (it wasn't the case before the patch).

Reproduction Steps:

• Have the game in Windowed Mode
  
• Want to focus, as usual, like before (i.e. combat), Ctrl+D to switch from windowed mode to fullscreen
  
• Game doesn't really freeze (music and SFX still works, but nothing else)
  
• Black screen -> Alt+F4 (had to disconnect (read: alt+F4) during the event due to this)
  

Additional Information: >BLACK SCREEN< (it's just a black screen.)
The game is in Windowed Mode, of course.
Before the patch, it didn't do that. And it's not consistent either. Sometimes it works flawlessly like before; sometimes it doesn't and end up like so.

Thank you.

Do not repeat this template for unrelated bugs, each needs their own thread.

---

"Life has become immeasurably better since I have been forced to stop taking it seriously." - Hunter S. Thompson
Favorite song
Second favorite song
Third favorite song (Changed: 26th Oct. 2025)
Did you sent something to me/factions/etc. and I forgot about it? Please send a message >here<!

[Petitioner]

Interestingly, I have the exact same issue, but only if I'm streaming the game on Discord. I can alt+enter to switch between windowed and fullscreen just fine, until I start streaming, at which point either trying to go from fullscreen to windowed or alt-tabbing out of the game while it's on fullscreen gives this flickering black screen which requires the use of task manager to kill the game.

---

Recruitment | Task Force Prometheus | ICN FIRESTORM

[Aingar]

Painfully aware of the issue which stems from the way FLUF interfaces with the game renderer. Several fixes were attempted that don't appear to have done much, if anything. A more robust fix is in the works, but no ETA at the moment.

A workaround is to turn off borderless window mode, since from what I'm aware it only occurs when that border mode is enabled (even if in fullscreen).

You can switch between the border/borderless modes in the FLUF config menu, you'll need to define a keybind to access it.

---