All my notes are gone on the Mac

First, let me say how sorry I am to hear this! As you may know from my prior posts, I’ve had issues with Apple Notes in the past:

The experience you are having once again increases my concern, though I am backing up my notes to DEVONthink, in addition to all of my other backups.

After several long and frustrating calls with tech support, the issue resolved itself. To this day, I have no idea what was fixed. I have not had an issue since then.