Could be FB. But I don’t see any ooze or cankering or shepherd’s crooks on the branch tips. Suppose I’ll just have to keep my eye out for new occurance
Sounds like and looks like fireblight if it attacks the whole tree branch by branch. Cut it out ASAP and disinfect the tools you use. See if that helps. I had it on my pear tree and one apple tree. I just dug them out to prevent the FB from traveling to my other trees. Probably overkill but it was into the main trunk as well.
There are many strains. For me it was rarely the pears, but occasionally it was only the pears. It seemed like there were different strains passing through based on that, some liked apples some liked pears.
Anyway post a picture next time. I would guess fireblight only because I can’t think of anything else that does that. It sounds like brown rot blossom blight except that apples don’t get it, only stone fruits do.