This is most likely caused by the new pane/iron bar rendering which makes them a 2 pixel thick "box" rather than a super thin pane with a two pixel thick edge.
*note
I have searched to see if there were any other pages about this bug, and haven't found any
Environment
Iron Bars, epically glitched when looking at an end on the left when facing direction 3
Linked issues
is duplicated by 6
Attachments
Comments 3
I can confirm as well. It seems that on straight lines of iron bars running north and south, the norther most piece does not render correctly.
Can confirm.