Foliage LOD's Screen Size Can't be Set Higher Than 1.5
Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 4827620, 5.1 CL 20024840
Steps with Project:
The static mesh will Change LOD more or less where it is expected but the foliage barely reacts to any numbers after 1-1.5
The foliage would react the same as the instance static mesh
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-69405 in the post.