Hovering over open applications in the taskbar makes them glow red and (sometimes) makes them pop up

[Microsoft Windows]

I opened up task manager today just to leave it running in the background, and now whenever I hover over it or other open applications in the taskbar they start glowing red. Also hovering over the open application in the taskbar instantly sometimes makes it pop up for some reason, yes I tried closing task manager, the problem is still present. It's obviously not a huge deal but it can get annoying when you accideantly hover over it when doing something.

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