It’s hard to know the exact issue without seeing the script, however you mention you’re using TweenService on what I assume to be the server as you mention it lags for the entire server. TweenService is quite taxing on the server and usually it lags for me even for remedial tweens which is why I try my best to mitigate TweenService on the server by doing it on the client, although I’m unsure if that’s the exact issue in your case.