Expand Group doesn't work after name change (Layer Groups V2)

I  can't believe I can't find any other comments on this... quite simply when I change the name of a Group I can no longer expand it or collapse it. The Expand Group and Collapse Group options cease to work and the group is left in the state it was at the time the name change took place. So if the group is Expanded when I change the name, then it remains permanently expanded, no way to collapse it. And some what worse/fatal, is if it is collapsed when I name change it I can no longer expand the layers within it, so the data attached to those layers as far as the time-line is concerned is lost and not accessible.

All layers still function I just can't access them etc.