androidx.constraintlayout
constraintlayout2.0.1 and 2.0.0 does not work in the same way as 2.0.0-rc1 and before regarding handling of constraints relating to views which are in the state of "gone". When a view is gone (also become a "singularity", it has shrunk to a infinite point, but should still be possible to relate to). If this is a "breaking" change or an error, I have not received any feedback on. Will try to make a proof of concept to check this out in near future. Could be checked here:
https://issuetracker.google.com/issues/166486001