Multiplayer disconnections

Hello, I’ve been working on a few different versions of my game. I am always having problems with multiplayer. Someone always gets disconnected, even with only 2 people.
It works perfectly in Preview! It is when I try on GD Games or even iOS and Android Apps, that there is a problem.

I will try to implement a data backup so player can reconnect, but this is really frustrating.
I’ve spent a lot of time working on this and can’t get the multiplayer to be stable.
Am I doing something wrong? Has anyone gotten multiplayer to work properly?
I read something about TimeDelta? Anyone know how to implement this correctly?

Thanks