Okay, I use ExpanDrive to map my OneDrive drives as folders on both mac and windows.
Boxcryptor does not have this ability, so that's what I'm using and why I'm using it.
The trick is, I mount those drives into Boxcryptor, create a encrypted folder, start to move data into it, and poof, the ExpanDrive drops the drive. In Windows, the explorer just locks up to the point that you have to go on a process killing spree in order to get things to normalize. In Windows, I can manage to move about 3 or 4 gigs, max, before the whole system locks up. On the mac, we are taking a few hundred megs before the drive drops.
Any ideas, other than deflections to speak with ExpanDrive, as I have already done this, and sent logs to them.