Well, just done it another 2 times, the wall is still closed. I've done anything that could've been done in CT; what a waste of time. Btw Cloak Tower quest doesn't show up in my quest log, which is weird (only visible on right side of screen when I'm in CT but still not in quest log).
That bug is so random. I've just tried to complete Cloak Tower quest (solo) twice in a row and the wall was locked both times I tried. This can't be that hard to fix. Seriously, this is frustrating.