I haven't been able to intentionally replicate the issue, but over the last couple of days I've gotten stuck twice after using flash flicker.
Both times I was teleporting past a mob, and when I got stuck the mob was facing my sprite, but attacking towards my previous location and damaging me. Nothing on the hotbar would cast, I couldn't charge chakra, guard or even turn around. All I could do was attack/interact, but even after targeting the mob I couldn't hit it back. Kind of a bummer way to end up with battle injuries.
I tried hitting cast cancel which has solved a few other issues I've had but that didn't work.
I've tried replicating it a few times since the most recent occurrence, but I can't seem to -make- it happen again. All I can think of is that it has to do with ping/server ticks or something.