when i try to dodge an immobilize, but get hit by it, my character always dodges AFTER the immobilize. This means i waste energy and intterrupt my casts, heals, whatever, so skills that have to be channelled like ether renewal go on full cooldown.
Usually i use ether renewal to get out of mesmer root to avoid blurred frenzy, but of course i try to dodge the root first and when it didnt work my heal gets on full coooldown because of a stupid dodgeroll i never wanted!