Since OBS 28 theres less HZ being outputed to the main monitor if using output projector to another screen

Operating System Info

Windows 10

Other OS

No response

OBS Studio Version

28.1.1

OBS Studio Version (Other)

No response

OBS Studio Log URL

https://obsproject.com/logs/Kp6SHFg_MIXNokRp

OBS Studio Crash Log URL

No response

Expected Behavior

When using output fullscreen projector to a screen the game should stay smooth as not using fullscreen projector

Current Behavior

When I right click and do fullscreen projector to my 3rd monitor the game feels like its playing at 60Hz (maybe its more but its noticeable to the point i dont want to play the game) even tho the same framerate is being outputed.

Steps to Reproduce

1. Open OBS and a game In my case is call of duty modern warfare II . Also happens in warzone. Didn't test in more games.
2. Right click the viewfinder and do output projector fullscreen.
3. Notice how the game is less smooth than it was.
4. Close Fullscreen projector on the 3rd screen
5. Notice that the game is smooth again
   ...

Anything else we should know?

This exact pattern on any 27 version build does not happen at all.

this obs is clean it only contains gamecapture and nothing more. this pc is not even streaming or recording

Start by reproducing the issue on Windows 10 with OBS 28.1.1: run a game, use the viewfinder's fullscreen output projector on a third monitor, and compare performance with it closed. Review the provided OBS log and confirm the fix by ensuring the game remains smooth while the fullscreen projector is active.