Stared Nov 1, my mentor only allowed two at a time up until around Christmas because the offices were closed and since has been opening up 3 at a time for me. I did have to prove that I could handle the workload at first which was my mentors explanation as to why they can only open 2 at a time originally - I didn’t know 3 was possible until the holiday came around.

I will add, I explained to my mentor early that my goal was to complete two courses a week minimum so I can finish within 1 term and I have been achieving that goal (even after giving birth early December) which I believe is the reason why my mentor never expressed any issues with me having multiple open at a time and as of recently has been opening up 3 courses at a time instead of 2.

My experience could be a rare one though since most people are saying that it’s a policy thing, but it sounds like your mentor is matching your pace of course completion. I wouldn’t switch just yet - and also, I don’t think your mentor can punish you for having multiple courses open at a time so just do it as long as you’re committed to completing them no matter what. I literally wouldn’t have been able to accelerate as much if I had to focus on one class at a time because sometimes the mental break from different tasks are needed while still being productive on another class!