After seeing the photos, I agree with the others, raise the blade. Even though you are cutting off what looks like a tongue (tenon, protrusion, whatever), I wonder whether the blade is interacting with the inside edge of the full board too.
Here is a little reminder that I copied from Forrest's website. I printed it and keep it taped inside a shop cabinet door for reference:
* Rip Cut: Raise the blade high. The carbide stays cooler and expands less during the cut.
* Crosscut Solid Wood: Raise the blade one inch above the top of the wood.
* Plywood: Set the blade height so that the bottom of the gullet is at the height of the plywood, to reduce or eliminate tearout. Cutting plywood is hard on blades and dulls them faster.
Some woodworking experts recommend raising the blade up to gullet height on all cuts for safety reasons. I think the idea is to reduce the amount of exposed blade that a person could contact. Forrest's advice seems more about best quality cuts and blade wear, while they accept a somewhat increased personal risk as a tradeoff. I would say that Forrest assumes you have a more professional competence, experience, and attitude towards safety. That's my opinion, nothing more.