in short CVs of old and new...
when kriya left, you went ahead with the story of dance and SS and taani came in. kriya was mentioned till august when rey dreamt of her and then twice more once by swayam and once more by neha and hinted at by rey thrice- before BB match/ first date with taani .
then even when there were occasions when rey should ve remembered her , he didnt- eg rose day/trip and its like a jarring note in the musical piece when that happens.
now the situation is far more ...advanced for rey- his relation with taani had progressed and it would be stupid on your parts to make him have complete amnesia once again and not remember her. i dont mean to say he should stay stuck with taani- its just more realistic to show a continuous story.
i know u do it all for TRPs and the calculations will be like this- TR fans are anyway not around , lets cater to KR fans only and make him amnestic - KR hate taani so on but you know who suffers at such a time - the story- the character looks sick- even diehard rey fans like me will feel yuck if he moves from one to another like a football or as i always call him a prize ass of the fandoms.
afterall creating a serial a character a story is an art and dont stoop again like you have done before - im talking about only rey as he s important to me but it would be the same for kriya as well or even SS .