Stopped receiving e-mail from a Google Group I've been a manager of for 20 years

I've been a manager of this group for 20 years. Suddenly I'm not seeing the e-mails I sent to the group show up in my inbox. They are going to the group because I can see them when I log into groups.google.com but they aren't coming to me. This makes it awkward to keep track of conversations.

This started happening probably yesterday as I did receive some messages I posted 2 days ago.

My account setting is to receive all e-mails.

Any ideas on what's going on and how to fix it?