Usually I just add in a small delay of 1 or 2 seconds however if you want to you could find how many object are in the game while in studio then just keep looping through how many there are when the player joins until the amounts are equal
The problem is on mine.because my game loads SO slow than everybody’s.like my pc is the most slow loader.and this also helps to break the scripts because of loading.
Example:My pc loads the roblox doors game in 7 minutes.(you already know this)