Bogus subscription expiration messages increasing in the last week.

I'm seeing an increasing number of clients getting expired subscription messages over the last couple of days.

Checking the client's accounts at the partner portal indicates they are up to date and the unlocking key there matches what is in their system configuration.

These clients are all on 2017.3 or better so it doesn't appear to be one of the patch issues.

Most of these client seem to have had modifications to their subscriptions recently so I suspect that the new unlocking keys were generated incorrectly or the Sage licensing server is having problems.

Anyone else noticing this?