Dreadnought Shield Wall Crash

Using Shield Wall on any of the bridges will somewhat frequently crash the game.
Occurred 3 times during combat, and I was able to reproduce it another 3 times outside combat after a few attempts.

Having this same issue.

Very reproduceable. For me, if I cast shield wall, then firewall, and then slam the wall to make it explode it will crash to desktop. No error given. Just gone.
Most recent one just now, I was indeed on one of the bridges.