Blc. with black spots/yellow leaves

[estación seca]

What is the ambient temperature? That kind of shoot loss happens with insufficient watering and with too-cool temperatures. The green leaf I see is wrinkled, suggesting the plant didn't get enough water at some time in the past.

It is hard to get good healthy growth on Cattleyas in a temperate winter, even with supplemental lighting. Most people's growing areas are too cool for strong growths.