Tips To Fix Game Crashing
• Try going into a game you don't crash in and in-game settings, turn fullscreen on. This will reset every time you join a game so turn it on before going into a crashing game. 
• Close all background apps
• Time it perfectly and exit Roblox then quickly enter it when join a game you crash in. If there're blinking dots at the bottom then the game is still loading. If you're not fast enough when exiting Roblox, the game loading will stop bringing you to the Roblox Home Screen.


I hope this was helpful to you!