There is an issue occurring when creating brushes with the pen tool at grid size 5 where verticles or the brush shape itself seems to be doubled. This issue also occurs if the grid size is 1, though it does not always reproduce, and does not occur at any other size.
Thi issue does not appear to be a regression
Versions Tested: Issue occurs on all versions Tested
4.17.2 CL - 3658906
4.18.3 CL - 3832480
4.19p6 CL - 3919652
4.20.0 CL - 3879785
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-55928 in the post.