Python script breaks if logged in 2 devices?

Question: i was testing my scripts and had my replit logged in my laptop and tablet at the same time.
While running a line of code, its not executing correctly like the letters printing out backwards and all over the place.
Had to copy and paste the codes from my backup file, and logged off my ipad, then worked fine.
Has anyone had this error?
Or it advisable not to log in, in multiple devices at the same time?