I didn't know it was a common problem till I saw this thread, but I can confirm that I've seen the same thing and my Phals were actually fine.
It's disapointing isn't it.
My last two got bud blast soon after I bought them, and some of the flowers dropped. Luckily some of them survived for a couple of weeks or so.
I was worried at the time that they were unhealthy plants... but I didn't do anything special (I didn't read OB then so I didn't know WHAT to do), just looked after them as I usually do and now both of them look
really healthy with a lot of new roots, several new leaves each, and one has a new spike just starting to produce buds and the others has a short start of a spike.