Looking to take a little kink out of a bevelled edge on a SubD object, I turned on the Vertices filter and selected four verts that I wanted to ensure were aligned with others and ran SetPt for the Y direction. I expected to be able to pick another vert as my target because the Vertices filter was set but could not, and all geometry was presented, including occluded, but distorted in the Y direction as though I was snapping to something further back.
Clicking on the vertices filter again whilst SetPt running did not turn it on. After SetPt finished, the verts filter worked fine again immediately without needing any intervention.
Rhino 7.5.21096.11001, 2021-04-06
Edit: Above behaviour in smooth mode - seems OK in box mode.