Bug: UVEditor hard crash with SubD object

Hi @andy ,
I think the UVEditor does not like SubD objects. It seems to work with low face count SubDs, but memory consumption still is pretty high and will not be released like expected.
Also I had really hard crashes trying to use UVEditor with medium SubD face counts (500-1000 faces). 32GB RAM used up in 5 sec and computer freezes.
Thanks, Jess