RAX78 Nighthawk/AX6200 - random devices that were previously allowed in access control get blocked

I have had prior Nighthawk device and used access control for years with no issues.
Just bought RAX78 and it arrived a few days ago.  Updated to latest firmware before using.  From the very beginning I have had issues with some devices that were allowed in access control but will randomly switch to blocked.   Sometimes I can easily change them to allowed, other times I have to completely disable access control to get it to update the list of devices properly and then enable access control again.   Obviously this is not preferred since it allows a short time when devices could potentially access my home network when I don't want them to.

A little off this topic but it would be nice to be able to sort the Access Control list by any of the columns.
Would also be nice to be able to search logs by string.

Thanks