[1.2.2753] Shuttle not launching after completing pirate camp, and loading pawns

[rufus_the_cat]

Hello!

After clearing out a pirate camp quest in Royalty, receiving the mission complete letter, and re-loading colonists, the shuttle remains stationary and will not re-launch back to base.  In the error logs, I've tracked:

Exception ticking ShuttleLeaving5111088 (at (121, 0, 59)): System.NullReferenceException: Object reference not set to an instance of an object
  at Verse.GridsUtility.GetThingList (Verse.IntVec3 c, Verse.Map map) [0x00000] in <d72310b4d8f64d25aee502792b58549f>:0
  at RimWorld.Building_Door.Tick () [0x000a0] in <d72310b4d8f64d25aee502792b58549f>:0
  at Verse.ThingOwner.ThingOwnerTick (System.Boolean removeIfDestroyed) [0x00021] in <d72310b4d8f64d25aee502792b58549f>:0
  at RimWorld.ActiveDropPod.Tick () [0x00009] in <d72310b4d8f64d25aee502792b58549f>:0
  at Verse.ThingOwner.ThingOwnerTick (System.Boolean removeIfDestroyed) [0x00021] in <d72310b4d8f64d25aee502792b58549f>:0
  at RimWorld.Skyfaller.Tick () [0x00000] in <d72310b4d8f64d25aee502792b58549f>:0
  at Verse.TickList.Tick () [0x0015c] in <d72310b4d8f64d25aee502792b58549f>:0

Here's the savefile: https://www.dropbox.com/s/jwmgcpx2c9hkyku/BOURBON%20BARREL%20%28Permadeath%29.rws?dl=0

[Pheanox]

Any chance you have a save from before you loaded your pawns on to the shuttle?  Without that I'm unable to determine if this is a vanilla bug or something going on with one of the mods you have active.

Thanks!