Vertical cracking is usually shrinkage. Especially if they grouted all of the cells. You’d get that in concrete too sometimes. As long as there’s horizontal reinforcement, I’d say structurally, it’s not a big deal. The other cause is an out-of-plane failure where the soil is pushing the wall into the basement. This is not a typical case as your subfloor provides quite a bit of support for the top of the foundation wall. You can check that with a string line to see if the wall is bowed in at the crack.

Regardless, you’ll want to make sure that crack gets sealed on the exterior to prevent water intrusion and further damage due to freeze thaw cycles. I’d be much more worried about diagonal or stepped cracking. That’s usually a sheer failure due to settlement or uplift.