TBH, paying auto-pay is risky thing when it comes to credit card bill payment. A small error in system, may make you pay 36% interest and ruin your CIBIL score. If it works no issues but at one fine day is enough to ruin all that we have built in this financial system.
Manual payment helps u track your spends and gives some sense that how much you're spending on that card. If its automatic after 3 or 4 months, we may stop checking bill amount which in turn increase our spends unnecessarily.
Think again..
Btw, tried any apps like amzn or banks like HDFC -- did you observe any issue with auto debit setup?