I've found that sometimes randomly Ch/R's Shadowstab will cost the energy, and do the motion, yet only the second smaller hit will actually hit. The first hit just isnt there. It's not very common though. I find it to be more common on the first hit of aggro.
First Time I have heard about this one. Sounds to me like the same issue as Shadowpulse not working in shield form, Might be related.
I'd add Forge Effect's short period
You pretty much summed it up
I believe Forge is the counter part to a Knights Enhanced armor. Therefore they are both 5 Minutes. I know this is Annoying and sometimes we forget and screw the group up

but somethings we have to deal with. I think 5 minutes was intentional.
Oh and Hathore VERY nice to see your still around.

Been along time since we have seen you? They keeping you busy?