Cattleya Missing Lip

[Harris E.]

Hello,

I've had two seperate Cattleyas bloom with missing lips in the past month. First time it was C. percivaliana, now it's my C. Melody Fair. I wasn't too concerned about the percivaliana because it was a first bloom and I just figured that it was an immature plant. But the Melody Fair has bloomed multiple times for me in the past without issues so now I'm worried. What's the deal?

I grow them cool/intermediate in a small greenhouse in San Francisco. Fertilize 2x/3x weekly (depending on weather) with K-lite at 40ppm N. Once per month supplements of KelpMax at 1 tbsp/gall and just started Inocucor Garden Solution at 1:100.