Anyone encounter the above mentioned issue ? I realise that using a few of the gears in the rear d .. sometimes during coasting which ocasionaly my legs juz backpedal the chain will loosen and drop to hit the chainstay . does not happen to all the gears though .. is this normal? at first i thought it was the chain being worn out n loose so went to check at the shop but turns out the chain is still relatively new.. anyone knows if this is a normal thing or the cause of this problem?