Hello @toxic gulch ,
I'm sorry to hear you encountered trouble receiving invites from your friends. If you are playing on the Microsoft Store version of the game, please rest assured our team is aware of this happening and the issue is being investigated. In the meantime, we recommend asking your friends to set the multiplayer session's visibility to Public and limit the number of players that can join the server, enabling you to join them from the server list.
You can see other problems we are working on in the known issues list: https://callofthewild.thehunter.com/known-issues-list/
If you are experiencing this problem on a different platform, please report it to us in a ticket using our support portal: https://support.thehunter.com/hc/en-us/requests/new
We will be more than happy to assist you!