Bill Tindall, E.Tn.
Bash the damn knot and get on with it paying price of a minute on the grinder to recover.

Or, baby the tool and hope it held up.

Screw it. It will grind out easily. And I learned something, actually several things.

most of all I was delighted with the fit. Finished up some mortises. I use the chisel to scrape the bottoms.....same attitude as above. No damage.