I have been building a game using world composition. I have found that everything works great in standalone and in the editor if I have no procedural foliage. But the second I add procedural foliage, the standalone game crashes. For perspective, I built a giant test level in the editor with tons of foliage (8129 x 8129), and everything runs great in the editor play window/viewport.
But I cant even run a small level (253 x 253) in standalone with the foliage, so I dont think its a foliage scale problem.
What happens during the crash is that my player will spawn with some foliage for 5-10 seconds. Then the computer slows down… then a few seconds later it eventually freezes my entire computer which forces me to do a hard reset on the whole computer.
There are no warnings or errors in any of the logs and no crash reports, which is very unhelpful to me 
Specs:
MacOS, UE 4.22
4 GHz intel core i7
32 GB 1600 MHz DDR3
AMD Radeon R9 M395X 4096 MB
I have heard of a similar problem with people using Nvidia graphics cards, but I have an AMD card.