I had the very same issue. Very same angle, just on the left side. I would shave at a slight angle down and more back at the same time, basically a guillotine stroke, and it works fine until you hit that jaw line. For some reason, right there it grabs and takes on a little bit of slice action and wham. Try shaving with a more straight unangled down stroke, with the grain, and it will cease. Shave that spot with a safety razor, gently, until it heals and basically avoid it with the straight for now. Good luck, hope this helps.

Best Regards,

Howard