Results 2 comments of Charles Goggins

I've found that disabling Wayland and rebooting gets it working properly. This issue was forced upon Flameshot by the developers of Gnome from my understanding. To disable Wayland: uncomment waylandenable=false...

You're welcome! It's indeed a workaround. It effectively tells the OS to load X11 instead of Wayland, which is where the problem seems to lie when using Gnome. Has to...