I have two objects in a group. One of the objects in the group is made visible/invisible at various times, and the group as a whole is moved around. Sometimes, the objects that is changing visibility gets 'offset' from the group origin, even though it is never moved (except as part of the group as a whole). It almost seems as though the object sometimes 'misses' getting positions updates when the group is moved while that object is invisible. Note that the group as a whole is always visible.

This is a somewhat rare problem, but definitely reproducible. I had to work around this by ungrouping the two objects and manually moving each of them to identical positions. This mostly works, except when there are occasional networking delays that cause one object to get the position update a frame later than the other, and lag position when doing 'move to/by over time'. Thus, it is not a perfect workaround.