Strongbox disables abilities and "ties you in place"

Several times over the last few days I've experienced clicking a strongbox and not being able to use any abilities, and also at times not being able to move more than a screen or so away from the strongbox.

I use demonform, unsure whether that is related or not to the issue. A relog fixes the issue, at times going out of demon form does, but that does not always work.

This happens to me with 1/3 of strongboxes and been going for a while Please fix this.

Happens to mee as well, something like once in 40-50 strongboxes, but I am almost fully committed Atlas tree to strongboxes, so I have a lot of boxes around maps.

Simply disables all controls over character. The only fix I know - log out to character screen and log in back and control will be given back.