See attachment. I saw this when working with assets from version .1981 - but I checked in .2009 and it's still there.
1/5 = vertical brick pattern missing entirely on the right side, compare to 9/13
11/12 = only a single vertical line missing, circle shows where, compare to 3/4
Stable Branch ingame screenshot of issue:
(https://i.imgur.com/Sndz5we.png)
"Literally unplayable"
On a serious note: Planks has similar issues, but they aren't really apparent, except for image 1/5 - because planks are much more random in their pattern anyway.
[attachment deleted due to age]
Bump.
Should be easy to fix with Photoshop.
Fixed, thanks for reporting! ;)