[Unity 6 + D3D12] ExclusiveFullScreen window gets stuck as tiny window in corner after Alt-Tab - anyone else experiencing this?

Hey everyone,

I'm experiencing a frustrating issue with my Unity 6 (6000.2.6f2) game on Windows.

The Problem: When running in ExclusiveFullScreen mode, if the player Alt-Tabs out and back in, the game window gets stuck as a tiny window in the top-left corner of the screen. It's so small that it's unusable, and the player can't restore it to fullscreen.

Setup:

• Unity 6000.2.6f2
• Direct3D12
• Windows 11
• GPU: NVIDIA RTX 5070 Laptop (latest drivers)
• Display: 1920x1080 @ 180Hz

What I've tried:

• OnApplicationFocus callback to restore resolution with Screen.SetResolution() - doesn't work
• Multiple restore attempts with delays - still fails
• The logs show Screen.SetResolution() is being called but the window stays tiny

Logs show: OnApplicationFocus: True RestoreNow - Current: 1920x1080 (Windowed) -> 1920x1080 (ExclusiveFullScreen)

But the window remains stuck in the corner.

Questions:

1. Is this a known issue with D3D12 + ExclusiveFullScreen?
2. Should I just switch to D3D11 and/or use FullScreenWindow (Borderless) instead?
3. Has anyone found a workaround for this?

Any help appreciated. Thanks!