Could be bug in newer versions to if set manual more modern settings for tls versions

If you set for example in httpd.conf or in ssl.conf ( apache)
SSLProtocol -All +TLSv1.3 +TLSv1.2

The ssl soption in virtualmin gui for virtual server doesn’t reconize those.
It defeault there still have all not secure ssslv3 tls 1 and so on choosen on.