I recently made a nav file so bots and move around this map, but I found a weird box that you can get stuck in.

Just before the first capture point, on the left side of the track heading towards the first point, coming from BLU spawn.

There's a boxed room you can crouch jump into:
http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=528135809

Once you're in, you can't get out. There's an invisible wall preventing you from exiting:
http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=528135826

I'm asuming that his area is supose to be off limits to players, but that's my two cents.