Why does the SSL certificate disappear in ISPmanager when another one is installed?

Question

ISPmanager

There are 2 sites:
- site.com
- subdomain.site.com
For each of them, the simplest certificate was bought, NOT Wildcard
The problem is as follows:
I install SSL on the site.com - everything works fine I
install SSL on the subdomain.site.com - it works, but now the main domain stops working on https
As it turned out in the panel on the "SSL certificates" page - only one, the last one I installed. Tell me why this can happen and what to do so that they are installed on the domain and subdomain.
Bought for each address separately

Answer 1

Hello!
You can check that there is no alias in the aliases for site.com in the settings of www-domains: subdomain.site.com and vice versa.
In theory, if they are isolated from each other, then everything should work.
You can also contact us directly ispsystem.ru, our specialists can check what could be the matter.