The user when logging in with Facebook and uploading a file to their dashboard (frontend) to change their profile image, is automatically disconnected.
Trying to upload an image we get the following response:
302 POST async-ajax.php 200 GET https://example.com/wp-login.php?redirect_to=https://example.com/wp-admin/async-upload.php&reauth=1
So image upload fails, cookie is invalidated (reauth = 1)
Read more here:: Facebook + WordPress frontend upload return async-ajax.php 302