You may have accidentally increased and knit that stitch for a few rows. When you dropped it, it left the gap. If the bag is felted, I wouldn't really worry about it. See if things even out when you tug at it a bit.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry