Stem rotting?

[Kingak]

Hello,

I have an orchid that has black rotting (?) parts that are slowly expanding - is this of any concern?

Please see the attached photo- The bottom black part just showed up in about 2 weeks and the top got larger in around the same time..

Thanks!

[Dimples]

Is the discoloration surface level, isolated to the leaf attachment points, or is the actual stem underneath impacted too? Is it soft/squishy or dry/papery/leathery?

Tell us about the growing environment and watering/care practices.

[Kingak]

The part of discoloration are softer than other parts of the stem, I can’t really see whether the stem underneath is affected but the affected areas are definitely growing larger..

I water about every 4/5 days depending on weather, the orchid is in medium sized bark with some perlite and charcoal, I put a tiny bit of moss just to cover the exposed roots on top. The temperature where I’m at is about 24-28C and 50-60% humidity