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High strength is likely your problem. Lower them to medium. What is likely occurring is your connecting to the one furthest away because they're screaming for each other. Also locating them in corners is likely not the best as you need to think about a circle around each one if you put it in a corner most of that circle is outside your home
I've never seen or heard of it as a bug, thats why I was recommending update. I use double tap (i find triple too much) in many projects and never have issues. Are you programming on push and double tap?