two years into leash work with our 60lb staffy mix and weve gotten her to 90% loose leash everywhere EXCEPT one specific stretch of three houses on our regular block and i need to understand whats happening on that block before i lose it

Beans is a 60lb staffy mix we adopted at 11 months from a regional rescue, shes now almost 3.5 and the leash work has been the slow grinding project of our entire dog ownership life. we did pat miller style force free, we used a freedom no-pull harness for the first year and a half, we did the "be a tree" thing every time the leash went tight for what felt like a million walks, and somewhere around month 16 it finally clicked. she walks beautifully on a flat collar now, loose leash on 90 percent of our walks, even past loose dogs in yards, even past kids on skateboards. im genuinely proud of where she got.

heres the thing thats breaking my brain. there is one specific stretch on our regular morning route, about 200 feet, three houses in a row on our own block, where Beans goes from textbook loose leash dog to a 60lb torpedo. she locks onto the air at the property line of the first house and pulls hard for the entire stretch until we clear the third driveway, then she pops back to normal walking like nothing happened. we walk past 40 other houses on this loop and shes fine. its only those three.

weve tried to figure out whats going on and i feel like i have ruled out most of the obvious stuff. no dogs are visible in any of those three yards. weve walked it at 6am, noon, 4pm, and 9pm and the behavior is identical regardless of time of day. theres no fence she could be reacting to behind, two of the three are open lawns. one house has a porch cat we have seen exactly twice in two years which doesnt match the consistency of her reaction. it is so clearly a scent thing but i cant figure out what scent and more importantly i cant figure out why ONLY those three houses when the rest of the block is fine.

what im actually trying to figure out from the people who have lived this. has anyone narrowed down a hyperlocal pulling issue like this and found out what the actual driver was? and the practical question on the back of it, do i need to do desensitization work right on that specific stretch, or is the right move to just reroute around it and call it a win at 90 percent loose leash everywhere else? part of me thinks the latter but part of me thinks im going to keep wondering what that scent is for the rest of my life