Wall cracks are a very common issue in poured foundations.
Most poured walls crack from shrinkage when they dry/cure. This was a new house, not even finished and yet the backfill settled a little and water accumulated next to the foundation. This accumulation was allowing water to trickle into this area. When the grading and gutters were finished this most likely would have stopped but our homeowner and the reputable builder weren’t having it, so we injected it, problem solved for good!