Upon loading a game, mechanized airlock open

At first I thought it was something wrong with the automation but it seems automation error is the result of what is happening and not the cause. It takes 8 game steps (ticks?) to establish rooms, in the meantime critters in other rooms trigger the automation.

On load:

One step forward

Step 2: all rooms are one

Step 8 establishes rooms but it is too late...

In the meantime automation: on load, step 1, step 6
  

What triggered automation:

Changed Status to Fixed