The toolbox is "slaved", for want of a better word, to the first image opened, whatever that image may be. If I move the image window, the toolbox moves with it. I am in multi image mode; I've checked. If I activate a different image and click on a tool (or anything in the toolbox) the first image becomes active and jumps to the top. The effect of this is that I can really only work on one image at a time. Work effectively, that is. I'm probably just missing a new setting or something.
GIMP 3.0.0 (Mac)
Mac OS 13.7.4 Ventura
GIMP 3.0.0 (Mac)
Mac OS 13.7.4 Ventura