Actually the issue may not be related to that. I for instance since recent patch find that I can get those issues mostly in Cyrodiil when trying to sprint on my mount while such Mournhold works as expected.I just realized you are on Mac. I found your post via Recent option. My bad. I don't know if it differs on Mac but on PC this game in crowded areas will be limited by CPU. I often will have my GPU downclock while fps is under 60. Elden Root and Rawl'Kha are good examples.