PsychoPy crashes immediately when changing the colour space for polygons

OS (OSX Monterey 12.2.1):
PsychoPy version (v2021.2.3):
Standard Standalone? Yes
What are you trying to achieve?:

Simply change the colour space in the appearance tab of a polygon to the normal 0:255 RGB space. If I play around with the colour picker (by pressing the little icon on the right side) PsychoPy immediately crashes.

Moreover, PsychoPy also immediately crashes when I click on one of the colour names that are on the right of the colour picker tab. The only possibility of not crashing PsychoPy currently is to immediately fill in the colors for “fill color” and “Border color” without ever pressing the colour picker. In that case I can only use the RGB PsychoPy colour range from -1 to 1 like this $[-1, -1, -1].

I am setting up a class for beginner students, and I wanted them to use a standard 0-255 colour space. Many of them have Mac computers and it constantly crashing when changing colors might be very frustrating for them.

Is there any knowledge on why that happens?