Hi @robertwills, I think it's wise to take a break, maybe for a week or two, so the pattern of the angry repetitive behavior will be broken and may be replaced with something else.
A counselor from the Alzheimer's Association told me that emotional memory lasts a long time because the feeling stays with the person. Maybe the person you're walking had a dream or hallucination that associated you with something unpleasant. A break will do you both good. I hope it works, and if it doesn't, you gave it a try. If that's the case, maybe you can find a way to be helpful to the person in a way that does not require your physical presence.