Beans for Canada / Harricana ?

Hello, I'm contacting you with a question about beans from Canada. I was brought some dry beans that were named "Harricana" because of the story telling that they come from a tribe that lived along the river, but no further details are available. Therefore, it would be an heirloom variety.

What I'm sure of: the beans were black when sown, dating back to 2019.

I'm looking for information regarding propagation. When I sowed them, I sowed black seeds, all uniform in color.

After a planting season and waiting for the pods to dry, upon shelling, I discovered beans that were 90% white, 5% yellowish, and 5% black.

When a pod had a black bean, all were black (same for the white). When, by chance, two pods were still attached by the branch at shelling, both pods had black beans (observed twice).

After 2 weeks of drying, no white to black conversion.
Same with forced drying. I also tested waiting 2 weeks on the vine, with an equivalent ratio (I had white grains that had already germinated in the pod!)

Given the age and storage, I had a germination rate of 30-40%.

Does anyone here know the name of this variety? Do you have any information on the changing color of the grains?
Thanks for your interest!

Here's a photo of the harvest: