This bug report was originally going to be about the stairs in room 173, but following the MTF's on their way through the site, I found an area where an MTF gets stuck in room2offices, as shown in this first video: https://www.youtube.com/watch?v=zpBrPMc8QK0

In this next video, the one MTF that was stuck in the office has been respawned with his two buddies due to them leaving the stuck one behind. The MTF leading the caged has a hard time going back up the stairs in room2servers2, and eventually phasing through the stairs. Keep in mind that this same issue happens on the stairs in room 173 going from the bottom office to the upper bridge: https://www.youtube.com/watch?v=oXHmhxYKtAs

Now, I assume this could have been fixed if the two MTF's had left the stuck one behind, but as shown, they never move on, leaving them stuck there assumingly, forever. I have not tested on any other stairs besides the ones in 173 and room2servers2.
I'm not an expert on the Blitz3D engine, nor do I know how the room making process works, but I propose instead of the player and various AI climbing up every step of the stairs, put invisible ramps up all the stairs found in the game, making accents up the stairs much more pleasent, and less likely for the stair bug show here to happen.

-SpinoRavenger