I do not know how to take video of game play so I can not get "proof" of what I will tell.
Near Angi the Archer's Cabin, there is a Dragon Lair. You can climb to an overlook in sneak mode so you look down onto the Dragon, hidden from view.
using a sneak archery shot, poison included both paralysis and lingering damage, i sneak shot the dragon. It took about half health from it. it tried to start flying and then crashed landed only 2 seconds later. I was able to then stick two more arrows (sneak mode) and finish it off. I do not know if it succumbed to the paralysis effect, but it gave this impression.
After a dragon takes a certain big damage shot or takes too much damage they crash land. So It's an intended scripted event not the paralysis doing It's thing. Example, I snuck up on a dragon sleeping on a tower. Hit him with a dagger x 30 sneak attack for a single shot kill, he popped up in the air, flew a bit, crash landed and died. They just do that stuff sometimes.