Hi! Honeycrisps have a very high chill hours requirement, as they were bred to survive the bitter cold. I'm in zone 7b and have had a Honeycrisp for three years and mine hasn't blossomed yet.
I'm guessing yours probably met the chill requirement at the nursery where it was originally grown, probably up north ,so it was fruiting when you got it, but in the hotter climate it's not setting fruit buds.
I'm hoping mine may fruit when it's older, but it may not, should be interesting to see!
Hope this helps!