The buds do look like they are going to drop to me.
I had a similar thing last year. I bought two Phals and one was fine while the other had bud blast a couple of weeks later.
I think sometimes one Phal will react to the change in enviroment/temperatures/humidity etc, while another will be fine with the same changes. Or maybe one of them was in different conditions to the other until just before you bought them.
Hopefully it will be like mine in another way... less than a year later both plants gave me a loverly new show of flowers from new spikes and both have grown healthily.
Of course it could also be a sign of root problems. If it is in a clear pot take a look at if the roots seem healthy. In my case they did so I left it. If you can't see them or are not sure you may want to repot and take a good look while you do.