I attached a video of the problem in practice, I can't use the eyedropper tool directly through the fill and outline shortcut, this problem applies to all effects that have eyedroppers, such as ultra key, fill, essential graphics panels and external plugins.
I'm using four monitors connected directly to my graphics card. I've been using them before, but the issue started when I switched two monitors, my main one being a 34" LG ultrawide.
This also happens when Premiere is only used on the main monitor. I've tried resetting my workspace, and the issue persists.
Yes, I'm using the recommended resolution and scaling options on all monitors.