Hello,
I apologize for the delay, I was looking into this issue.
What you’ll need to do is setup your teleport mechanics on the server side instead of in the client. However, the teleport function itself has issues when it comes to replication, so consider using set actor location instead and seeing if that makes a difference in your setup.
Also, for your convenience, here is a link to our networking documentation: Networking and Multiplayer | Unreal Engine Documentation
If you run into any other issues while setting this up, go ahead and leaf through the documentation and see if you can find what you are looking for.
Have a great day