Liquid node callbacks

[Termos]

I'm trying to get some code to run when liquid floods an air node. I tried on_construct on flowing water node but it doesn't seem to work for liquids, verified this by running the same code except with 'dirt' and it worked.
on_flood on the other hand, the docs say it doesn't work for air nodes.

Is there any way to intercept the event that an air(&like) node is replaced by liquid?

[Inocudom]

I don't know how to solve the issue that you are having, but I am wondering why nobody gave any advice here.

[TenPlus1]

The only callback you could possibly use is on_flood which you would need to override 'air' node and insert, but this may be slow.

[Termos]

Thanks, alas, on_flood is useless as well.

I was asking in context of this

Finally I used active block modifiers, which is the wrong way technically speaking, but there seems to be no other way.
Surprisingly, there's no noticeable impact on performance.