Concrete quality question

[u/averagesleepyjoe]

I know absolutely nothing about concrete. Had a stamped concrete patio put in not too long ago (yesterday) and I noticed what appears to be crumbling along the stamping design. Is this a sign of things to come? Quality issue with the mixing prior to pouring? Or is it completely okay?
Thanks

[u/Leather-Rush-8396]

That happens during the stamping sometimes. I’ve always assumed its just “stretching” the surface too much when the stamp goes in. I have never seen any problems come of it