letsencrypt bug on multihost system
If you accidentally enable let's encrypt on second host, it probably fail (because domain is not pointing to that server) and it will disable ssl on all host (even with valid ssl).
https://git.ispconfig.org/ispconfig/ispconfig3/blob/master/server/plugins-available/apache2_plugin.inc.php#L1224 The WHERE should only affect the currect vhost on this server, not any vhost with the same domain.
Server OS: debian Server OS version: Jessie ISPConfig version: git
Change WHERE condition from "domain" to "domain_id"