Buds on phalaenopsis stopped growing & buds look deformed

[Suse]

Hello,

I bought this phalaenopsis about a year ago and it was flowering perfectly. Two or three month ago it has grown a new spike with lots of buds, but unfortunately the buds have stopped growing - they get to about 3mm and then they stop. What is also strange is that these little buds open a bit - its as though the orchid thinks they are now fully grown and tries to open the tiny blossom, but of course that does not work. The plan itself looks health (leaves and roots) and keeps growing new buds on the spike, but none of them look healthy.
Does anyone know what might be the problem? I would be very grateful for any suggestions!

Best wishes, Suse