I've had bho crumb up like that a few times.
Here is a batch I didnt a while back. Kind of similar texture just different color.
It usually happens when I purge at a higher temp (120-140F) for multiple days.
From my experience the genetics of the plant, the temperature, the surface area, and the time purging all play a role in end texture/consistency.
It could definitely be something else, but bho would be my guess too.
If you look up honeycomb or crumble that is what it looks like, just broken up into pieces.
Medical grade just means it would pass a residual solvent test with <10 ppm IIRC. That's what most dispensaries require when selling oil.
You can make a medical grade product with or without a solvent.
Full melt bubble hash made with ice water or oil made using the rosin tech would be considered a solventless extract.
Using a polar or non polar solvent such as butane, ISO alcohol, co2, hexane, propane, etc would be a solvent extract, however if it is purged properly (<10 ppm of residual solvents) it is considered to solventless (ie has near zero residual solvent present in the oil).
Here are the residual solvents they test for: