Editor hangs for 30 seconds when I play or undo

Thank you for the suggestions. I’ll try some of them out. Honestly, I think it’s something with the editor itself, because the project worked flawlessly before I updated versions. And not only that, but the editor itself hangs for about 30 seconds every time I load the main level, and when I’m editing materials it will do it randomly. It sucks because I was really excited for the update, and I’m trying to get the ball rolling on this game, but as soon as I upgraded it started acting up. If it’s not the DDC, then I have no idea what else to try.