How are you certain it isn't a moisture problem? Vaulted ceilings are notorious for poor ventilation and on the flip side being near the water may be introducing moisture from the air. The tape letting go is a common problem with moisture but not a common problem with vibration.
Can you post a picture of the tape coming off?
What is in place for ventilation above that drywall?
And where are you in terms of climate?
Bud
Can you post a picture of the tape coming off?
What is in place for ventilation above that drywall?
And where are you in terms of climate?
Bud