New-PnPSite removing full stops/periods from Alias/URL

When creating a new site with full stops in the Alias these are removed. Sites can be created manually through the SharePoint UI with full stops in their URL.
The associated group retains the full stops in its name.

Steps to recreate:
$adminsString = 'Adminn@TenantName.onmicrosoft.com'
$siteName = 'New site with Full Stops.'
$siteAlias = 'GBL.SharePoint.FullStop.Test'
$SiteDescription = 'Site Description'
$newSite = New-PnPSite -Type TeamSite -Title $SiteName -Alias $SiteAlias -Description $SiteDescription -Owners $adminsString
$newSite
https://TenantName.sharepoint.com/sites/GBLSharePointFullStopTest

The following site can be created in the tenant from the SharePoint admin page:
https://TenantName.sharepoint.com/sites/Test.Full.Stops/SitePages/Home.aspx

Source - it appears to be from the PnPFramework\Sites\SiteCollection.cs file (this call or one of the similar ones):

            string siteCollectionValidAlias = siteCollectionCreationInformation.Alias;
            siteCollectionValidAlias = UrlUtility.RemoveUnallowedCharacters(siteCollectionValidAlias);
            siteCollectionValidAlias = UrlUtility.ReplaceAccentedCharactersWithLatin(siteCollectionValidAlias);

Which goes to PnP.Framework\Utilities\UrlUtility.cs

        public static string RemoveUnallowedCharacters(string str)
        {
            const string unallowedCharacters = "[&,!@;:#¤`´~¨='%<>/\\\\\"\\.\\$\\*\\^\\+\\|\\{\\}\\[\\]\\(\\)\\?\\s]";
            var regex = new Regex(unallowedCharacters);
            return regex.Replace(str, "");
        }

Which removes the full stops.

As I'm new to PnP & Github what's the best way to resolve this?
I'm not sure where else RemoveUnallowedCharacters is called from or for what purpose so don't want to just remove the dot replacement from the regex as it might be required elsewhere:
const string unallowedCharacters = "[&,!@;:#¤´~¨='%<>/\\"\$\*\^\+\|\{\}\[\]\(\)\?\s]";`

Start in PnPFramework\Sites\SiteCollection.cs and trace its calls to PnP.Framework\Utilities\UrlUtility.cs, especially RemoveUnallowedCharacters. Check other callers before changing the shared character rules. Done means New-PnPSite preserves full stops in the alias/URL while the other disallowed characters continue to be handled correctly.