Anyone else have trouble with these?

I've been growing "ordinary" phals for at least 10 years, and they
flower every year, almost without problem. One, which unusually has 3
flowering stems, lost its leaves (crown rot?) over 18 months ago, but
continues flowering without leaves, and has now produced 3 keikis (with
possibly 5 more on the way). All these phals were houseplant gifts or
donations from those without green fingers. They were probably all
sourced from M&S.

Earlier this year we were given one of those M&S dwarf phals in flower.
I put it with the others, and grew it the same way. Within a couple of
months I noticed the remaining flower buds were not looking right, and
one by one they fell off, soon followed by the leaves. After a few weeks
it was dead. We replaced it with an almost identical plant a couple of
months ago. It flowered well, but the flowering stem lasted a much
shorter time than normal phals. As it seemed to be a bit loose in its
pot, I repotted it a couple of weeks ago. A few days ago I noticed the
leaves seemed to be turning yellow. This morning the last one fell off.
I think the compost heap awaits it...

--

Jeff