Double-sided geometry collision doesn't work when using physics set linear velocity. This does not occur when using floating pawn movement or character movement components.
Working as expected in 4.19 CL# 4033788
This also occurs on 4.19.3 CL 4033788
Found in 4.20 CL# 4302132 and 4.21 CL# 4348893
This is a regression
The pawn will move through the back of the plane but collide with the front.
The pawn would collide with the plane regardless of what face it hits
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-63902 in the post.