It is possible that you either missed a payment or that the payment transfer you initiated failed. Do check your complete CIBIL report thoroughly. It might be an error, and it can be fixed. Ensure that there are no delays in your payments on your end, and request a manual review of your account with CIBIL.
Regarding the increase in credit card utilization by 13%, it is highly unlikely that your score would decrease by 80 points due to this change.