Voice selection checkbox (visual appearance) in parts generation broken

In Musescore 3.5 alpha, part generation from 2nd, 3rd, or 4th voice now works. For example, if a new part is added and only the second voice is checkmarked, a new part with only the second voice will be generated.

However, as in previous versions of Musescore (3.3, 3.4), visually in the parts popup, if the instrument is clicked away to a different part and clicked back, the checkbox seems to change back to the first voice.

I have attached an image of what I am trying to describe.