Do you run a lot of speed? I've noticed with running Templar with swift, steed, wild hunt, etc; I get more position desyncs. In the past, if you got tpo far it would either rubber band you to where it thinks you should be, or just crashes out. If I notice desync, I generally just take the gap closer off.
Edit: just saw your video. Doesn't look like tge same.
Seems to also positionally desync my character the moment this streak bug happens, leaving me stuck on server side wherever I cast that streak... while client side I'm able to still move around and even cast other abilities.