I am not sure if this glitch has been discovered before however, recently on a RHS koth match i discovered this "glitch".
This first image is a wall, I basically got real close to the wall and looked upwards onto the main tower
I basically look up towards the tower and https://steamuserimages-a.akamaihd.net/ugc/934932894535831043/EFC3A8B2D86653265E8355DAD3ACB1AA1FA9A52D/
When i fully looked up I noticed bodies and weapons, upon further inspection the bodies were actually a live and players were moving around (you may need to zoom in to see the players) https://steamuserimages-a.akamaihd.net/ugc/934932894535830819/B304214312ECB145D669CACBBDFD66B7742A5F88/ (EDIT)
unfortunately my shadow play wasn't working at the time.
Please note I am not sure whether this is a arma bug or a koth bug, if this has already been reported please disregard.