Saguaros,
After further testing, I realized that the issue about Blob showing or not are only on the Teacher List. On the Teacher page, it is showing correctly.
It is also the same for when any of the contact fields are left blank => on Teacher page the icons do not appear, they do appear on the Teacher list when the fields are empty but set to show. Not a big deal, but the default is set to "show", so the icons are coming up for all new teachers if they do not intentionally select "Hide".
Not sure if this helps you or not.
Regards,
Serge