ah - only just now read this. I also did not have this "common knowlege" but I suspected that much ...
For expecially in the DtU map, there are several resurgence items and indeed, sometimes it didnīt work so I suspected, it sth to do with items because the spell always works.
Does it only NOT work on armors or generally not or are there really two resurgence feats in the editor when you create an item and one is buggy ?
I havenīt ever realised there were two...?!