Catt sheaths dried up

[Donald]

I postyed this on the Cat forum but only one response.
Hi everyone. Have had a puzzling thing happen to my
Cattleya BLC Buton D'or 'Lewis' AM/AOS. I have had it for seven years and it has never left the spot it's been in during that time which is a south facing spot in a sunroom with constant humidity and varying temps. This fall it did what it has always done at that time and produced sheaths which when looked at contained buds. Then the sheaths started to dry up, which sometimes they would, but this instance they dried up and the buds dried up also. I am at a loss as to why this happened as there was no signs of any pests,no radical changes in temperature or humidity. Outside of that the plant is a picture of health with a great root system etc.
Needless to say all feed back will be welcome back with open arms. Thank you
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