Recently, my color wheel within Krita (the shortcut one which comes up when you hold down using a pen and the one which appears as a window menu) automatically go to dark blue no matter how hard I try to change the color. I have to use the specific color chooser instead, since the color wheel won't let me change its color frustratingly. Does anyone know why this happens and how to fix it?

I don't know if this is related, but i know tha using CMYK color space introduces some weird behavior to the popup pallet color wheel.
If this is your case, try changing the color space.
You can also bring the Advanced Color Selector as a canvas popup by pressing "shift + i". Or set your own shortcut for this.

Thank you, I'll try doing so and see if it fixes that weird automated behavior.