Why did orchid buds fall off?

Could you elaborate on the circumstances surrounding the orchid buds falling off? Were they in a particular stage of growth? Did they receive adequate sunlight, water, and nutrition? Was there any visible sign of disease or pests? Additionally, had there been any recent changes in the environment, such as a temperature drop or relocation? Understanding these factors may help us pinpoint the cause of the orchid buds falling off and provide appropriate solutions.