Perhaps it's similar to the one where a tactic flashes on your hotbar and you have to IL before you can change to that tactic? hmmm

Hmm... were they literally deflected (ie: the swirling white ball), or did they simply not cast?

I've noticed an inconsistent bug while using rifleman specials from the bridge. In certain spots, if I'm using a special, it will go through the whole timer, but simply not effect the enemy. The reuse timer starts up, so it was "used", but there was no effect on the target. No hit, nor miss. If I'm in concealment and using a Sniper Shot, it will break, as per usual.

Everything goes as normal from the player end, but it seems the bridge swallows the attack somehow.