A few behaviors have been found in the first day post-release, and we are addressing them all. We have fixes for virtually all of them, but one MAY (but is not certain) be an issue in REAPER’s handling of right-click events on controls in VST3 plugins on Linux specifically. That’s being investigated both on my end and on Cockos’. I am pausing at the moment to give them time to look at this - it’s unfair to expect them to drop everything to look at it.
Thank you all for your excellent bug reporting and your patience in allowing me to make a proper fix instead of just throwing code at the problem until it goes away.