I have seen unique flaking on cobbs blades before, I don't think the shaping or removal of stacks is leaving a unusual or distinct shape is uncommon.
In 2020 I found a number of cobbs. Here is one that immediately stood out as one similar to yours. At first glance when I picked it up, I thought "nice blade, a bit broke on the hafting area."
But in reality, the blade had been purposely knapped and formed into this shape, almost like the knapper "clipped" the hafting area.
If one considers a "clipped" wing projectile point, its not too far off to see this also has those characteristics.
The cobbs in profile the area to the left and upper left look unusual, and you can see the beveling, sort of, on the upper right.
Holding it differently you can see the hafting area has been flattened with flaking strikes which are not common, but intentional on the relic. Again you can see the beveling somewhat on the blade portion.
Here it is as found in the field.
And then picked up.