Thanks for the advice! Glad to know I'm at least not the only one. I will try again, but this time focus on the eye movement preceding the head movement and also on slowing down the pace. I wasn't going very fast to begin with but perhaps it was still too much. I will let y'all know if that seems to address it or not.
@JamesPTA I don't know if I would consider myself to have a history as I've never had any major concussions. Nothing that I ever had trouble recovering quickly from after the fact. However, I did play American Football and have done Muay Thai sparring in the past. Both of these activities have likely caused some minor concussions during that time. I have heard that even minor ones can cause issues later in life so.....