UPDATE: Since I posted this morning, Professor Maps got an update from Google with a copy of the warning email they send and SEL did a nice write up about the issue as well.
For those of you who work in Google My Business accounts often, this may be news. I was working in a GMB Bulk Feed account yesterday and noticed several of the thousands of listings in the account had a notice of “Disconnected“. The notice said, “This location can’t be connected to Google right now. If this problem continues for more than two days, try deleting the location and adding it again or contact support.”