Eerie Mojang Office Party: Creeper room has window with no glass so explosion can send player out of bounds

problem with the Eerie Mojang office party when in the creeper section of the mob factory there is a window with no glass that you can go through if a creeper explodes and launches you out this happened to me twice you can get out of bounds. the window with no glass is on your left as soon as you enter the creeper room