I had the same experience with LE autoupdate. It's been working on a few years on my dedicated server and one day I woke up and all my certs were expired. LE fa

I had the same experience with LE autoupdate. It's been working on a few years on my dedicated server and one day I woke up and all my certs were expired. LE failed on autoupdate and was failing to renew certs. It took me approximately 2hours to get it working. Had to change DNS TXT entries, get new ACME accounts as old accounts was creating new directories mydomain.com-0001 and mydomain.com-0002, which would mean I would have to change config in postfix, dovecot, nginx and more...