Favicon in Simplecorp theme Won't Display in Main Domain

In the SimpleCorp theme, I have a domain and several subdomains. After installing SSL, the favicon will not display for the main domain front page - just in Chrome. It works on other browsers, and it works on other pages in the main domain. The subdomain favicons work just fine. I tried reloading the favicon file in the theme appearance settings, but it still won't work. I am using the default shortcut icon in the simplecorp appearance settings.

The code in the index file is:

When I type https://www.mysitesname.com/favicon.ico in the address bar in Chrome it goes to my front page. The code in .htaccess sends a request for the favicon to the front page:

# Pass all requests not referring directly to files in the filesystem to
# index.php. Clean URLs are handled in drupal_environment_initialize().
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !=/favicon.ico
RewriteRule ^ index.php [L]

Any ideas on how I can edit this to send requests for the favicon to the actual favicon file?