only one person who has commented is actually from zwift. Have you tried all the things suggested throughout the entire thread and the other threads on the same topic?
Someone has said what works for their iPad (full factory reset without using a back up to restore) and someone else has mentioned getting a solution with windows (installing some missing file/exe). Not sure if there have been people claiming a solution for other operating systems (other than the standard/obvious Bluetooth or HRM issues)