It seems that there is a problem transferring American Express Membership Rewards to ANA. Transfers are able to be initiated but points are not successfully landing in ANA accounts. The issue started on 9/2 and doesn’t seem to be resolved as of yet (although American Express reps are saying the issue was August 1 – August 31). Initially American Express was blaming ANA for the issue and ANA was blaming American Express. American Express now seems to be acknowledging they are responsible for the issue and not ANA (at least front line representatives).
It’s unclear when this issue will be fixed, but something to keep in mind if you need to transfer to ANA. Some transfers are seemingly going through fine.

