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
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