Non radar equipped AAA can see at night in 2.5.1?

I got used during those many years flying DCS that non radar equipped AAA like 23mm on Ural or enclosed were completely blind at night and you could actually hover above one without being engaged.

So I was a bit surprised to get hit last night by 23mm from this kind of unit while it was pitch black outside.

Note that I don't think it is all bad. IRL I guess operator will fire in the direction of the noise, or use the aircraft lights (if left on) to aim, but I would just like to get a confirmation that it is or isn't a bug and that's the type of behavior we will get from now because it changes a lot of things for mission builders.

Thanks.

If you are using external lights or flares or the AAA is in a group with Radar vehicles they will fire at night i think