Edit:
the bug happens along the line between f6 and e6
Update:
So I had another game on Rubellite as my kitfox and after getting a rather large lead decided to try recreating the glitch for science since my team no longer needed me. All you have to do is jump off the ramp leading up to the location, and then if you land on the small ledge sticking out in the middle of the wall, you can walk along it and slide through the wall.
Here is another screenshot, this one being the second instance where I intentionally got stuck in order to see whether or not this bug can be intentionally created.
https://imgur.com/week2KV
(note the ramp used to jump down here)
Edited by Xaius, 17 November 2017 - 09:25 PM.