The way that map exploits are supposed to be handled is with a slay - and something as minor as ducking behind a prop and sniping (which keep in mind is very accessible in this case) is very easy to pull off with practice and understanding, as well as skill. Playing in intended parts of the maps should never be punishable, especially when you're just playing the game normally.
We apologize for the player's unjustified punishment. A personal apology will be sent to them as well. Thank you for your report.
The issue will be addressed accordingly.