Drop Pods Suddenly Not Landing

[Pokerking1993]

Hello,
I just started having an issue of drop pods not landing and I am getting tons of log entries of the following. I added the vanilla expanded vehicles mod a few weeks ago and have had drop pod raids since I added it so it came out of no where. Ideas?

Edit: I have two settlements on this save and the issue is only on one of the settlements.

Exception ticking DropPodIncoming11089577 (at (99, 0, 296)): System.ArgumentNullException: Value cannot be null.
Parameter name: collection
[Ref C03FBC88] Duplicate stacktrace, see ref for original
UnityEngine.StackTraceUtility:ExtractStackTrace ()
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.Log.Error_Patch1 (string)
Verse.TickList:Tick ()

[someonesneaky]

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