Imported FBXs that use UBX will import their collision rotation incorrectly. You can see this when scaling the collision non-uniformly.
Found in 4.20 CL# 4369336, 4.21 CL# 4541578, and 4.22 CL# 4618663
Results:
The collision will scale on the incorrect axis. If you look in the StaticMesh Editor the rotation is set incorrectly
Expected:
The collision would scale correctly
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-67153 in the post.