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It could also be familiarity. Had similar issues with ours and the flashy tube lights people/dogs/cyclists wear after dark. Trained ours via lots of reassurance - soon as she saw one told her to heel or sit, then gave lots of praise/strokes until it was gone. In time started walking up to people wearing them, asking if my dog could say hi. After a while she relaxed, and now just ignores them.
I'm not sure it's a food thing/recall thing. It feels like/looks like "wtf is this person doing running up to me they are a bit scary. So i'll run up and bark, then chase after them"
It sometimes happens with other dogs. I'll be doing sit stays, fetching in a quiet part, then another dog will enter their peripheral vision, stiffen up, and then run over.
At which point the food is irrelevant.