Have to press key twice for shortcut to stick

Hi all,

A few days ago Photoshop started acting weird. For example, let's say the move tool is selected (V). I then press the C for the crop tool, but it won't stay as the crop tool unless I hold the key down or rapidly press C twice. To go back to the move tool, I either have to hold the V key down, or press it rapidly twice. And this is the case for all of the tools that I commonly use. I switched over to Illustrator and InDesign to see if the same behavior happened in those applications, and it did not. I only had to press the key once to get the corresponding tool.

I've reset the preferences, and restarted the computer a couple of times and the behavior stays the same. Any idea how to fix this?