At least for Fenix 5X this has been a bug for a while now. Courses created in GC have had TbT cues but they no longer have. The issue has been present for months and yet no fix on this issue. If i understand correctly GC decides to add cues based on device the course is sent to? If this is the case I do not understand how difficult it is to get back to working since it seems to work fine on other devices. Just a flag somewhere they don't bother to update?