So a week or two ago, I reset my skill points at a shrine in Grahtwood on my Nightblade, who is using a shadow build. For the most part, I took all of the same morphs save for a few, Concealed Weapon being one of the same morphs. This time though, unlike in the past, it didn't stay rank IV, it went to rank III, and no longer stuns enemies I hit from stealth, or while invisible. I've seen that some other people, via zone chat have been having issues with the ability itself.
Is anyone else having this problem, or are things just more resistant to stuns after level fourty-five?