Food for militia units

[alxpv]

According to the manual (5.1.9.26): ... Zone Militia will also deliver Supply Items and possible Replacement Troops to your SHQ.
By Supply Items I think it means ammo, fuel and food?
It works with ammo and fuel. If you look at the Zone Inventory Bar at ammo, for example, it shows: ‘X’ produced (tooltip: ‘X delivered by Zone Militia’), ‘X’ delivered to SHQ. At the SHQ Inventory tooltip for ammo it shows: ‘X’ received from zones, ‘X’ delivered to Units.
All numbers add up. All ammo needs for militia needs are covered by this ‘Zone Militia’ entity. It first sends it to Zone, Zone sends it to the SHQ and the SHQ then delivers it to the units themself.
The same happens with fuel.

But with food something weird is going on.
If you you look at the Zone Inventory, under the production column, it will show that some number of food is ‘delivered by Zone Militia’. But this food is then never sent to SHQ!

For example, Zone Inventory Bar, Food (numbers are not exact, don’t have access to the game right now):
Produced: 100 (40 produced by assets + 60 delivered by Zone Militia)
Consumed: -10 (consumed by workers)
Out (sent to SHQ): -30 (= 40 produced by assets - 10 consumed)
Where is Militia food? Why is it not sent to SHQ?

In the SHQ Inventory tooltip for food it will show: 30 received from zones, 60 delivered to units.
So it looks like all the food for militia units are getting lost somewhere.

Is it a bug or am I missing something?