I think you can try to fix some entrance by putting some objects inside or outside of the building to avoid this kind of exploit for the most used access....

First way i know:
https://youtu.be/iNC7avEtX0E

I played in official RAID servers not a scenario of mine.

yeah if you want to block it i'll make some video to show the two other ways i know of.
It will be better for some people but by the way we'll still be able to snipe in higher places... should be it fixed or not? This question is yours.

you can also get there by just climbing without do any glitch through the rocks ;)
It don't seems to be an issue by the way since there is like 3 ways including this one to get there

I'm just completing it since i came out from the same bug 3 times in a row on the same game on Raid Gamemode.