So I just moved over to GIMP from Krita (temporarily stuck using a pretty slow Linux machine) and after a bit of work everything is set up fine except that when I hit my undo express key on my Wacom, it holds for a second and my next brushstroke starts with the fucking color selector on (ctrl key). Any GIMP users here got a fix for this?
Also, GIMP/Linux general I guess

(Pic unrelated, it's just something I drew in Krita)