The Target Layers Scrollbar UI for the Paint section of the Landscape tab does not scroll completely to the last element.
Tested in 4.21.2 (CL - 4753647), 4.22 (CL - 5159901), 4.23 (CL - 4980862)
Expected: UI scrolls correctly showing all the element
Result: The Editor UI scrollbar cuts off at the last element
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-71095 in the post.