When the game is started, any edits done in UEFN will currently desync live edit. This makes it so that you have to wait 2+ minutes everytime you do an edit and the game is running.
The most optimal way of fixing your game is running live edit, then any issues you spot
in game you fix on UEFN without stopping gameplay, then continue. Now, the constant desync that happens when you do that adds a lot of friction in this great process of optimizing and improving our games.
If this feature gets added, it speed up our workflow greatly and allow us to run the game and instead of taking notes of what to fix, we address the issues directly, then continue building in live edit after the game has ended (because then we need to see the changes and run the game again, but having to wait adds a lot of friction to that).