My workflow is: (1) Make initial changes in LR (2) edit in PS (3) final edits in LR.
Prior to 2015.4, if I then went back into PS, all of the original changes I made in LR would still be there. Not the case anymore - everything is reset. This is annoying and really disrupts my workflow. BTW, when I edit in PS, I choose ("edit original"); I don;t necessarily want to make another copy and I want the changes made in LR to still be there.