Crack in Basement Floor

I am building a new home which has poured concret walls and floor. The walls and floor were done at least 2 months ago. We are finishing the basement as part of the home construction and unfortunately, the plumer did not put the plumbing in for the basr sink and dishwasher prior to having the basement poored. They had to cut and jackhammer the floor to put it in and then patch the floor about a month ago.

We just noticed that the patched area is slightly separating from the floor and then we noticed a hirline crack forming from one side of the patch over to another area. The crack is about 15 feet long.

Is this something I should be concerned about??