There is missing geometry on both of APEX Fire Escape Stairs.
It works as it should meanwhile you are straight down but, when unit is walking sideway it sunking it down.
https://streamable.com/ek9pp
https://media.discordapp.net/attachments/585095817132507147/632920290296463391/unknown.png?width=722&height=676
https://media.discordapp.net/attachments/585095817132507147/632922616298078228/unknown.png?width=1075&height=677