Q.Why Does The Bud Drop Off The The Lipstick Plant Before It Blooms?
plant is healthy water it when soil is dry

Certified GKH Gardening Expert
Unfortunately, there are several causes. This can be due to there being too much nitrogen in soil, pH being off, temperature fluctuation, Lighting issues, and several other things. This plant can be a little picky. These articles can help:
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-moisture-in-plants.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/test-soil-for-pests-and-diseases.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/making-sure-soil-drains-well.htm
https://www.gardeningknowhow.com/houseplants/lipstick-plant/growing-lipstick-plants.htm