What a shocker, watch this.
A piece of black walnut put to the tablesaw and wanting to divide so that a contrast strip can be put to the centre of the board plus additional strips top and bottom edges.
It turned into a banana.
This timber was prepared the day before and the strip you have looked at was cut through the thickness of the board which was 55mm thick. Four pieces were cut from the plank this way and four more were cut across the remainder of the plank horizontally, making eight pieces in all for 8 boxes. The boards cut horizontally have fared no better they do not lie flat.
So that first cut is wasted but the second and subsequent boards were not divided through the centre and have been firmly dealt with by gluing on edges only and put in straight jackets whilst glue sets.
Looking at the four pieces so far set up they look to be OK this morning.
Another lousy board from the same supplier as that Maple that came last year and at the same time.