When I make some windows as a glued component in sKetchup then If I will erase, hide, or turn off layer on which is that component then the face to which window was glued to stays with the hole in it.. it doesn't update..
Maybe ENS doesn't update becouse it waits for signal from sketchup to update it .. and in sketchup actually the face doesnt change... it can be something with the observer.. I don't wont to pretend that I am wiser then I am.. I think there was some other cases when geometry was not updating.. usually inside of groups etc.. this is fresh for me so I wrote it.. other cases maybe someone else will add..