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[ Version 1.08 - Build 1676 ]

In the North Pacific Shootout scenario, one second after the P-3C is destroyed all of the neutral units on the map become automatically detected. I've attached a screenshot showing the issue, as well as a .zip with two save files: one just before the P-3C is destroyed (no autodetected units yet) and one just after, with the neutral units newly detected.

This can also be reproduced in a new save by simply unpausing until the P-3C is shot down around the 20-25 minute mark.

I think it has to do with the posture of "Downed Pilots" side in the scenario. They only show up when the a 'downed pilot' is created when the P3 is killed. In one replay from the save, the 'downed pilot' was not created, and the civ and nature units didn't show up.
And if I kill the 'downed pilot', then the civ/nature units start to degrade detection.

You're absolutely right, good catch. It turns out that the issue occurs even if you use Add Unit in the editor to add a random unit like a ship to the Downed Pilots side. I.e., it looks like it manifests when Downed Pilots gets its first unit. I have no idea why that might occur, but it does suggest an easy temporary workaround for myself and anyone else who encounters the issue. Simply commenting out (Lua comments are `--`; two hyphens) GenerateSurvivors() in the USA_UnitDestroyed event action prevents it from manifesting, at the cost of the scenario's survivor/SAR interactions.

I have seen this exception in the last build playing another scenario, could it be related?

But not reproducible in the save

01-03-2026 13:21:27!!!WARNING!!! EXCEPTION FUSE REACHED (x400 exceptions) FOR : -- Bv1.09 RC - Build 1825.2 -- Object reference not set to an instance of an object. -- Scen : Trident Boreal -- DB : -- Exception: Object reference not set to an instance of an object.
Stack Trace: at Command_Core.Side.btbtm3VhuTI(ActiveUnit , Scenario )
at Command_Core.Side.ProcessAutoDetectableUnits(Scenario theScen, Single elapsedTime)
Call Stack & Error details:
Error at 101054:

I think the fuse exception has been fixed for the official release.

Is the OP issue a matter of problematic scenario design, then ?

I don't know much about scenario design but I can't tell what might cause the issue that would be the fault of scenario design. I went through all the Lua actions in the mission and am pretty confident none of them is responsible. Likewise for the side settings for the Downed Pilots side.

It does not happen if you change the posture of the Soviet Union for the downed pilots.

From friendly to unfriendly or hostile.

Even if a survivor is generated, the civilian/nature side is not displayed.