That should not happen
Did you try doing the factory reset to the remote AP? it will revert also with a firmware it has on another partiition it hink
If that does not work... then open a support case or try upgrading the controller because that looks like a bug...
If it happens witha lot of raps then it might be a bug
If it happens to one rap then i could be a AP which is not working properly and they wil have to do a RMA....