Oh yeah totally forgot about Steely Defence. How annoying! I hope there will be a fix soon but there are bigger issues that need attention. Like when your TAB skill decides to do nothing in the middle of a crucial moment!
While this bug is very annoying it isn't really game-breaking in PVE. The debuff only lasts 5 seconds and can only stack once. In PVP, this could mean a free stack for another GWF. I'm wondering if our other skills can proc this. Gonna do some testing when I get home tonight.