Freeze Tool Bug Solution
There's a known bug within the last several versions of Maya when you want to invert your frozen mask within the sculpting tools whenever you have a multiple meshes in one transform. Currently, any of those freeze function only work on a single mesh island and the rest remain static. A few years ago I wrote a script fix for this, but never had a chance to share it. Well, today is that day. I hope this helps you with your modeling projects!
You can find the script on my blog:
https://www.artstation.com/blogs/jicdesign...