بسم الله الرحمن الرحيم
(Fatwa: 1189/919/H=10/1434)
There is no harm in supplicating silently and individually at the time of iftar. It is right without any karahat (undesirability), rather it is good. Not known from where you heard that?
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband
