Games are Laggy and How to End Rounds properly

I’m having 2 issues trying to develop games in Fortnite Creative.

Issue #1: The games eventually seem very laggy. Is there a reason for this OR is there something I can do to prevent this? Maybe at most I’m 70% used on the memory that it displays but there are sometimes the game can be very laggy in a certain spot.

Issue #2: What is the proper way to end a Round? I’ve been making a Cars vs Trucks game and when the Trucks kill all of the cars, I have an End Game device for that and I see the “Trucks Win” message. And for the Cars, I have a timer set up with another End Game device so when the time runs out, it triggers that End Game device and it says “Cars Win”. But the initial message shows a “Draw”. Doesn’t say Victory like it does for Trucks.

Any help is greatly appreciated.