Depending on the BB, the lubricant, and how much it’s “packed”, they cranks may not spin for a while.
Some bearings spin better under load and that is what really matters. Chris King is known for this, where they don’t spin for long when you have a wheel without a tire, but when there is actual load on the system, there is very little drag.
If you are worried about it, just swap out the bearings for a different brand.