I think that AD is currently somewhere in Bangalore at one of it's prestigious music schools, where he is currently figuring out new ways to improve his piano skills even further đ
He was absent before mondays episode because he was getting a haircut - somewhere in Sri Lanka I think.
To be honest though, it seems that the current storylines don't require him to do anywhere near as much as before and therefore he is not around much - which I think is fair enough đ
If storylines require him to be there often, I'm sure that he will turn up.
But yeah, you have raised a good point... it's very convenient that Durga/Bani/Mother India is facing such problems despite having the backing of a guy with enough money to air-condition hell! đ
It's one of those small liberties that story writers take when writing TV scripts because not many people look deep enough into the show to pick up on such things. Great point though! đ
God bless.