Invisible stairs from one side with no collision, able to throw grenades through

Go to the good sniper position on the bottom left of the Sandstorm map and you'll find said stairs.

Video evidence: https://medal.tv/games/polygon/clips/mWR0CtFEWWDbZu-PG?invite=cr-MSxSSG4sMjkxMDA4ODM1&v=47

Screenshot is provided in the attached image.

Reported by: kindmanathome1.0 (ID: 1445501298953945191)