Link to appointment calendar doesnt respect running on a different port

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Steps to reproduce

1. Setup apache on port 8443
2. Every link in the system will get url:8443 on it except the one for appointments that will be without port.
3. Make sure that overwrite host parts reflects 8443

Expected behavior

The shared url should contain the port

Actual behaviour

The link does not contain the port

Calendar app version

4.6.6

CalDAV-clients used

No response

Browser

Chrome 122

Client operating system

Ubuntu

Server operating system

Debian 12

Web server

Apache

Database engine version

MariaDB

PHP engine version

PHP 8.1

Nextcloud version

28.0.3

Updated from an older installed version or fresh install

Updated from an older version

List of activated apps

No response

Nextcloud configuration

Relevant parts of the config

        "overwrite.cli.url": "https:\/\/cloud.kafit.se:8443",
        "overwritehost": "cloud.kafit.se:8443",
        "htaccess.RewriteBase": "\/",

Web server error log

No response

Log file

No response

Browser log

No response

Additional info

No response

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The link in this screenshot should contain the port 8443 but it doesnt. All links generated has a port except for this one.