I use two G-Sync monitors, one is the 27" Dell S2716DG, the other is the 24" Acer Predator XB241H bmipr. Both are set to run at 144hz.

This only happens on the 27" monitor for some reason, but when I run games in borderless windowed mode, the display flickers occasionally. It is usually faint and I can ignore it for the most part, but there are also times where my frame rate drops significantly (as if Windows was alt-tabbed and focused on another window) and causes obvious issues. This mainly happens with League of Legends, which I tend to play on the 24" monitor because it's easier for me to focus on everything with a smaller screen. Manually tabbing out and back into the game fixes the issue until it happens again.

I have no idea if my monitor flickering and the frame drops are related at all, but both these issues only happen when DisplayFusion is running, and through my own trial and error I am pretty sure it's related to the program.

If there is any information I can provide to help fix this, please let me know. Until then, I'll just keep closing it when I play games.

I actually already have this setting turned off since I didn't really see a need to have my taskbars on both monitors.

That seems to have fixed it! Thank you so much for looking into this, I really appreciate it! Such a relief knowing I won't have to look for a different program to use for hotkeys haha

Unfortunately I may have spoken too soon, I just played a game of League and had the weird FPS drop issue again. I'm gonna try reinstalling since I haven't done that yet.

No luck unfortunately, still having issues. Strangely enough, it only seems to be happening with League of Legends for some reason. I've submitted a support ticket with them as well since it's possible it could be something on their end though, but I am still waiting to hear back from them.