We found a cheating strategy for the quantum cheat-sensitive bit commitment protocol proposed in Phys. Rev. A 84, 022308 (2011). It enables the receiver of the commitment to cheat with a probability not less than
1/2, no matter what values are chosen for the security parameters in the protocol. More interestingly, the probability for successful cheating will rise as the number
n of the particles used in the protocol increases and will be arbitrarily close to
100 in the limit $n\ensuremath{\rightarrow}\ensuremath{\infty}$.