Since the Lr 9.4 release & updates, I am having major issues with the masking feature functioning correctly. I can open the masking panel but if I want to perform an intersect with option, add, subtract, etc, the expanded mask panel will not open.

Once I perform the basic edits to a photo & then begin to add the various masks for further enhancements, the basic masking panel will open fine. If I try to then create new masks or add, subtract, intersect with on my original mask selection, etc, then the panel that contains these options will not open automatically as in previous versions. My workaround thus far has been to step back, click on the mask icon over & over until the secondary panel finally opens. Once it does finally open, it works fine on that one photo. If I begin to edit additional photos & create masks for those, I then have to repeat this process all over again.