Contact is removed from list if "can see me" is unchecked

[shresthashiva]

When "Can see me" option is unchecked and relogin the contact is removed from list.

[anzhieta]

This happens because of how the server currently stores contacts (a contact only exists if either they see you or you see them).
See the current status and long term fix sections in the document I wrote while I was figuring out how to sync contacts with the server last week: https://docs.google.com/document/d/1yoh_0ey9jhLFVerATzoxcbAgE7Dr3AmEEHtBYmXFMaM/edit#heading=h.ngwuocuicbah