I have found a bug from one of the players game-play and the bug it’s too small because it’s only one block. It’s pretty much a white glass and I am not sure why this is a thing. I understand that this is a small bug and it won’t do much, but it’s good to make sure the game experience is better for players to enjoy playing Murder Mystery. Below is how the small bug looks like.
Hey there 
Thank you for taking the time to report this. However, it would appear that this is intended for map design.
Cheers!