Witch Demonform cancel trying to open a door

Hello,
In act2, in The lost city, when i'm in demonform and try to open a door, it cancel demonform. It's really annoying, specially that there are a lot of doors. If it didn't impact the cooldown, it wouldn't bother, but having to wait for cooldown because we have to open doors to progress is very bad.
I'm sure there are other things that cause this.
Thank you.