After a few situations where I thought this happened, but weren’t sure, I just found a perfect example.
Sometimes, we use let’s Encrypt for a temporary SSL certificate. After a few hours/days, we replace it by installing a new (other) certificate. So far so good. The checkbox “Automatically renew certificate?” is being disabled by this, so I expect that Let’s Encrypt stops renewing/interfering with the SSL certificate.
Even though, I found out that Let’s Encrypt runs sometimes and replaces my manually installed certificate, even though I didn’t expect it.
I guess this is a bug.
I have an example live/running now, Virtualmin/Let’s Encrypt tries to install a new certificate every x hours. Because of a .htaccess-file this won’t work and because of this I found errors in my syslog.
This confirms my suspicion. How can I solve/fix this bug?