Not the same issue as you, but I had a nasty surprise this morning due to all doors being iced up. Unlocked the car as was getting ready to get my little boy to the childminders, tried opening drivers door normally as wasn't aware of how stuck it was, so tried again with a little more force and all ok. Came to open the rear door, pulled a little harder as I knew how iced up the drivers door had been, and the handle pretty much came off in my hand.
The cover, that makes up the part of the door handle where your thumb would be, flew off and the handle just flopped around. I was running late so got the cover back on best I could, but the handle was rendered useless so only way I could open the door was from this inside.
Fair play to the dealer, I took it down after work and it took them about 5 minutes to sort.
The fella in the bodyshop said they're only secured by a small plastic clip, so excessive force can cause them to pop out. Not sure if I used excessive force, but was a royal pain in the a*se!