There is an odd issue occurring when the world origin is changed, changing the world origin causes the foliage to cull in unexpectred ways. The issue can be solved by using the console command "r.AllowSubPrimitivesQueries 0". The issue can also be corrected by pressing the R key again. This issue also affects Apex Cloth. This issue does not appear to be a regression.
4.16.3 - CL: 3561208 - Issue occurs
4.17.1 - CL: 3586342 -Issue occurs
4.18 - CL: 3635932 - Project crashes upon opening
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-49692 in the post.