Phaius/Nun Orchid Questions and Concerns

[Mr.Mclovin]

So I have been obsessed and collecting orchids for about 10 months now... With that being said, I have been having some issues with my Phaius orchid. It bloomed great this past winter, and has a very lively new growth coming up from the base on its one side. The problem that I am having is with the older portion of the plant, the tips keep drying out and turning brown...

I determined that the worst leaf on it is the oldest leaf and is dying back due to just being old, but all of the other growth on the old stem was very healthy and is also dying back.

I keep doing research, and I was reading that the issue might be salt/fertilizer burn and maybe just not enough water. So I repotted it last week to inspect the roots, which was very root bound but overall healthy. There was hardly any dead roots... besides the few new ones coming out, they all were very white.

Does anyone have any experience with this plant to give me any insight? I would greatly appreciate it! Attached is a current pic of my plant, I have tried to cut off the dead parts but they keep working its way down.

Thank you for your time,

Mr.McLovin