Bedlam Raider Veteran attack unable to escape/always fatal

I've found that if you are able, switching stances and inputting the jump command (you'll have to wiggle your stances while also inputting the jump command) let's you escape.
It's entirely unintended as the raider will (sometimes) stand there stabbing the air with his lightning staff and be locked in that animation until you hit it.

But hey, it's a workaround.