Where did the flaking occur? Was it flaking or unraveling? Did it come off before or after you lit the cigar?

Some possible reasons -

Wrapper was too dry
Sensitive type of wrapper leaf
Poor handling at store
Sometimes cigars expand after being lit which can crack the wrapper
Might have been a patch job at the factory (notice any glue?)

Or it was cheaply/wrongly made.....that's all I got.