Slitherine

I have a captured V2 in Allied Corps. My game setting includes "reform units". The V2 is destroyed after attacking. Than (I guess due to reform units) it shows up again at zero strength for the next scenario, but I can't reform it.
The "replacement " button is not active.
I have 4K prestige and know how to reform units normally

Is this intentional ? If so, the V2 should not be affected imho by "reform units"

here is a screenshot:

Yes, this is intentional, and it's because the V2 unit cannot be reinforced/replaced/upgraded because of settings in the equipment file. So it will show up after the battle (like you say, 'reform units' doesn't seem to discriminate, it will probably simply list all lost units), but these unit settings will prevent the V2 from being reinforced by the player.