This has been bothering me for a year now! Once a month I would go and start my car and it would hesitate to start and I would hold the key on start until it starts all the way up. Battery is good, alternator was tested and was normal and starter is fine. It's rare that it happens but it does make me wonder.
I tested it one time when I turned it off while it was starting (hesitating) and turned it back on and it died completely