Well, that's not an issue of Mibew Messenger. It's the thing named
Referrer-Policy.
Mibew Messenger gets the URL of a visited page from the '
Referer' HTTP header, while it's up to browser to send something there, or even don't send anything at all. And a browser should behave just as he was told by a web server. Looks like your web server has either
strict-origin, or
origin Referrer-Policy. If you want to see the full URL in the tracked path, you should somehow change that policy, and the exact way to do so depends on your web server.