Just saw the BTS where Atharva has become crazy after hitting his head. I think this is just a ploy for Atharva to figure out his next move - he cannot pretend to be crazy forever nor can he plan another escape from the country, so his only solution is for him to stop Mudga's testimony. One way or another, he will figure out a way to keep Mudga from testifying. That is the only way Atharva's track can continue. Also, the actress that plays Mudga is shooting at the THR set, at AN.
We also know that Atharva has to maintain his nice-guy facade in front of Atul, so one way or another, he will find a way to escape everything again.
I also feel the same that he is just buying the time
but KalMa will not believe him
and will bring his truth out
oh! Mugdha at AN
may be Athu convinced her by his sweet talks
let's see