Enquiry for a child who lost his absolute pitch after Cycle 1 music

[Assumption Learning]

Hi,

I have child who has completed Tomatis C1 music. He is on ER0 music for 14 days. 

The mum feedback that he used to have absolute pitch, ie. He can play out a tune correctly after listening to it several times, on different chords. He would self correct if he got some keys wrong (rarely). And this is without any training.  

After the first cycle of music therapy, he can still play out the tune in multiple chords but got more keys wrong. And he did not self correct as much. 

So the mum would like to enquire:

1) Why did he lost his absolute pitch aft 1 cycle of music?

2) Can it be restored?

3) If yes, how do we go about for his music in the future?

Appreciate your prompt reply as the mum is rather worried. She hopes to restore it back. 

Tks

Agnes

Assumption Learning