| I agree with berkeleysgr8 that how it has been watered will be necessary to know what's going on. From the picture of the phal in tupperware, it appears that the roots are ok....? Its very hard to see, so if you can tell if the roots are firm and green (not mushy and brown), then the roots are probably not the source of the problem, and it could be watering. If the bark mix has broken down since its last repot, the orchid will not be able to get water and hold water as well as it could in a fresh mix.
I forgot to add that being in southern california could make the plant very dehydrated. The dry air and heat is not ideal for a phal. Again, it might need more water (depending on how more watering would compare to your current schedule).
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