Is Fee u/s 234F applicable for revised return even if original return filled within due date

I had filled my original return for AY 2020-21 on 10th October 2020 i.e. before due date.\

Received proposed adjustment intimation on 30th April 2021, against which agreed and submitted revised return within 30 days i.e. on 24th May 2021.

However I received demand for further penalty payment of INR 10000 against u/s234F.

Is it correct or unfair demand?

If unfair, how to I disagree for the same, which option to use ?

Will option "Rectification / Revised Return filed at CPC" work ?