Mac OS 10.12.6, Illustrator CC 2019 23.0.2

The colour panel repositions itself from my secondary monitor to my main screen whenever I click on whichever icon (fill or stroke) is in the background to activate it - meaning if I want the fill icon at the front, I click it, then the panel jumps.

This happens every time when swapping from fill to stroke or vice versa.

Please fix this so the panel stays where I've put it!