I've noticed that in some of my scenes IR refresh without any reason.
Usually this happen when we change key parameters but, in some cases, IR refresh view if some elements in the object manager or material manager are just clicked.
Investigating a little, this seems to be related to expresso tag, but not in every case.
Here attached "Door - modern", from C4D standard asset browser, that has this behaviour.
R
C4DR25 - Daily 8RC2
OSX 12.3