This has been happening for the last few months for me. Whenever a player joins my game, one of the things the client depends on to remove the loading screen is the backpack. It is more frequent than not that the server constructs the backpack object but the client doesn’t receive it until anywhere from 5 seconds to 4 minutes later. I’m not sure why this happens since the “leaderstats” folder I create on the server replicates just fine. Here are some pictures I took of the server and client hierarchy in a studio test server:
Client:
Server:
Once the Backpack appears on the client, the loading screen finishes quickly afterwards. The issue occurs on this game.