it supposed to recover 15 chakra if they do STD attack

This is the description of Ay' LA. It clearly states: "will use 4 standard attacks". So, he will use 4 standard attacks.

Now let's examine this.

It clearly says: "replace this unit standard attack".

So... I don't really understand your comment. Lateral bolt of Pain is a standard attack. And as i said, in other versions, Ay generates chakra with this auto.

Is this one of the difference we have in our own version?

Which Ay we're talking about, 4th Raikage or 3rd Raikage? pretty much this annoys me when people mention Ay / A, since all Raikages are called A's / Ay's.

Did you try to test it vs a full immune opponent team to verify if 4 standard atks that doesn't get access to the special tag one will generate the chakras normally ?

Ay 4th 4 standard atks nothing to do with Ay 3rd here.

Generally speaking, if a talent replaces a standard attack, then it is no longer a standard attack.

This is evident by the interaction those replaced attack have with "anti-standard-attack" effects like taunt and evasion (hinata, kimmimaru etc), those replaced attacks will bypass those effects and always hit.

It makes sense, therefore, for lateral to behave the same way, that is to say that it is no longer a standard. Unless you can provide actual evidence that suggests the contrary (you claim that's not how it works in CN/germany, so show us videos)

2:20 https://www.youtube.com/watch?v=3https://youtu.be/3BCFHVQaqrA?t=2m15s

As you can see here, he goes from 85 to 100 with his lateral bolt of pain. This is just the first video i found about Ay in CN.

For how it goes in the germany, i must admit that i can't point out a particular video since i don't really follow anyone besides Marw. Who was the one who told me so when i asked.

Interesting... thou it's worth to note that the one in the video is skillbroken, and lateral is a skill with breakthrough available, That might be the cause of the difference.

That said, it shouldn't, as both (unbroken/broken) are "replace standard", but it could be... somehow....

You're referencing a different future version as a counterpoint when this could be (Which it is) an earlier version

At the moment, it's considered a passive-empowered standard. Meaning it won't grant Samui's passive of charka gain. However, as you've seen. In the future, it'll change.

But for right now, it's working as intended.