Not with WabiSabi, you can detect this happening since you can register multiple inputs independently
You register 10 (non-private) inputs, and 1 of them gets rejected, what is your conclusion? To me, absolutely none.
Given that 9 out of the 10 inputs were accepted, you can conclude the round is not under attack since 9 out of 10 would have to be rejected for the attack to be effective.