Jurassic World Mash-Up Freezing and Lagging

The first time I went in, it was lagging insanely. And it worked for a while then whenever I drove somewhere, the vehicle moved at one frame a second. Then, it finally froze. I did a hard restart on my Xbox. I thought it was their fault, but it was Minecraft. I went in it again and I started moving to a nearby dock for a mission, and it froze again. The third time I stood still for five seconds and before I could move, it froze again! You need to fix this... people have gone crazy for this pack and I am really disappointed that it won't work.