The Catasetum group generally should be repotted only when dormant and leafless, not when in leaf. They tend only to make roots at the very beginning of new growth; if you damage the roots the plant may struggle. Even if I received a Catasetum plant in poor potting medium and it was in full leaf, I would not repot.
This group also prefers warm and humid summer nights. They use huge amounts of water when in growth.
Look for spider mites. These plants are spider mite magnets.
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