How do I permanently redirect www.subdomain to subdomain when using Wildcard SSL

I’ve setup a staging server for client viewing using a URL structure of subdomain.domain.tld (e.g.: client-abc.my-staging-site.com, client-xyz.my-staging-site.com, or whatever.my-staging-site.com).

• subdomain = “client site name”
• domain.tld = “my staging domain with top-level-domain.”

Please note that I’ve already installed a Wildcard SSL.

Thus far, I can get www, none-www, and none-ssl (i.e., http) to redirect to none-www with ssl (i.e., https) within my apache vhost file (see below).

I.E., I have the following URLs redirecting successfully to https://subdomain.domain.tld/…

• http://www.subdomain.domain.tld/
• http://subdomain.domain.tld/

Which is accomplished via this apache vhost file, subdomain.domain.tld.conf:

<VirtualHost *:80>
    # vhost domain with www in front of subdomain
    ServerName www.subdomain.domain.tld

    # permanent redirect www to none-www and http to https
    # must have a second <VirtualHost *:80> set up
    # change https to http if there is no SSL certificate
    # this is faster than .htaccess;
    Redirect permanent / https://subdomain.domain.tld/
</VirtualHost>

<VirtualHost *:80>
    # vhost domain without www in front of subdomain
    ServerName subdomain.domain.tld

    # rewrite rules enabled
    RewriteEngine On

    # redirect http to https
    # comment out if there is no SSL certificate
    RewriteCond %{HTTPS} off
    RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [QSA,R=301,L]
    
    #…all other normal config stuff goes here…

</VirtualHost>

<IfModule mod_ssl.c>
    <VirtualHost *:443>
        # vhost domain
        ServerName subdomain.domain.tld

        #…all other normal config stuff goes here; including ssl stuff…

    </VirtualHost>
</IfModule>

However I can not get the following to redirect to https://subdomain.domain.tld/…

• https://www.subdomain.domain.tld/

I’ve tried using rewrite rules in both the vhost conf file and .htaccess file, e.g.,…

# rewrite rules
RewriteEngine On

# remove the www on sub-domains; however because the ssl is called before the rewrite rules
# the browser will complain; if using a wildcard ssl, only the first sub-domain level 
# is supported the workaround could be to add every virtual host name in the Subject Alternative 
# Name (SAN) extension, the major problem being that the certificate will need to be reissued 
# whenever a new virtual server is added; nonetheless, if the end-user accepts the security 
# risk and proceeds, the url will be rewriting to the none-www which is secure
RewriteCond %{HTTP_HOST} ^(?:www\.)?(.*)$ [NC]
RewriteRule ^(.*)$ https://%1%{REQUEST_URI} [QSA,R=301,L]

Please also note, for some reason, when accepting the browser warning for security risk the browser retains the URL of https://www.subdomain.domain.tld/ (not good) and displays the files from the very first vhost on the server (also not good). If I can’t redirect, at least help me figure out how to disable this odd result.

Any suggestions would be welcome. Thanks in advance.