Mouse wont lock when l do a local server test

First off before I start, I dunno if this belongs in scripting support but I don’t know where else to put it.

So, in my game, it is currently very difficult to playtest things that revolve around seeing if things replicate across clients because for whatever reason, my mouse does not lock to the center of the screen when I am in first person no matter what I do.

Keep in mind, this ONLY happens when I do a local server test. It works fine everywhere else, and it’s very frustrating.

If you need more info, please let me know. Any help is appreciated.