This has been posted a few times in the PVP forums: https://forums.elderscrollsonline.com/en/discussion/320887/homestead-bolt-escape-bug-explained-video
I'm PC NA. This happens more often like this above video shows, i.e. through doors and openings at bridges and mile gates, usually when it is more congested, but sometimes when there isn't a lot of other players around. I play in azura's which usually has lower pops and a lot less latency and lag. I have however had it happen to me open world, not going "through" anything.
The way it works as I've experienced it is you activate streak and you get a partial animation of the lightning coming out of your butt, but your character doesn't move. It is very similar to being rooted in place by an invisible encase. However you can't dodge roll, cc break, attack, you can't do anything. In my experience I feel like I am not taking damage while this is occurring either, kind of like I'm invincible, perhaps I'm just not getting attacked though. The final thing I think I have noticed is that since I use streak the people that normally would get stunned by my streak still do, I just don't move.