Thanks to Rev. Sam I ventured a fix to this dangling Vanity Mirror flap.
After opening one visor I found the two "U" clips inside. I glued them back in as per Sam,s Video. I must not have done something properly. The flap only partially closes. Perhaps spring clips are worn out or the notch they go in are worn. The other visor had no clips at all. Bummer. I then decided to use button magnets ....visor mirror dis assembly not needed. Can be done visor installed but easier w/ visor out of car. This alternative fix does work but some may think it takes away from the oem design (looks). Please excuse the furry photos.

 

That's a darn good idea!