It seems like it wouldn’t be a big deal, it’s just one piece out of place. Did that one piece really grow faster though? No. It’s likely to be just parted differently, or curled more/less than usual. Cutting that one piece can cause gap spots in your layers.
“My bangs just grow so fast.” Yes, I know. I offer complimentary bang trims for my clients because of this. It’s right in front of your face so you see it grow more noticeably. The issue with trimming bangs yourself is that quite often you move your forehead to look up while you cut, this changes where they lay and results in bangs being shorter or more uneven than anticipated.
The beautiful bob Mulan gets from swording her hair off is an unrealistic expectation, yet clients frequently value their own skills over those of a licensed Cosmetologist. Please, for the love of hair, DON’T TRY THIS AT HOME!