secret door disappears when standing on it and closing it

[MonkestationIssueBot]

Reporting client info: Client Information:
BYOND:515.1639
Key:somerandomsandwich

Round ID:

5078

Testmerges:

• This is SS13 in 2014
• [PORT] Food and Drink Ports
• Hopefully fixes events running when storytellers are halted
• Cosmic ascension Star Gazer improvements
• Brings Kilostation back into the rotation
• [PORT] Moon Heretic
• Pathology passover

Reproduction:

Opening a secret door will make it, surprise, open. Closing it while standing on the door, however, will simply remove it. However, the game still registers it as being there, meaning you can't place a new wall, from what I remember from the last time it happened. The same thing just happened to me right now.