Fix some residual problems

Author: Starkku

src/Ext/TAction/Hooks.cpp

@@ -51,13 +51,20 @@ DEFINE_HOOK(0x6E427D, TActionClass_CreateBuildingAt, 0x9)
 		}
 		else
 		{
+			// Sep 9, 2025 - Starkku: There is some kind of discrepancy between AI and human players
+			// in how missions are assigned to buildings after unlimbo that I have not been able to figure out.
+			// Setting IsReadyToCommence to false and forcing missions to flush out any queued ones here is
+			// for now the safest approach.
+			pBld->IsReadyToCommence = false;
+
 			if (bPlayBuildUp)
 			{
 				pBld->ForceMission(Mission::Construction);
 			}
 			else
 			{
-				pBld->EnterIdleMode(false, false);
+				pBld->BeginMode(BStateType::Idle);
+				pBld->ForceMission(Mission::Guard);
 				pBld->Place(false);
 			}