The exact same thing happened to me last week. i wrote to support, got no response, and posted a question on another forum (but can't find it at the moment.) Let me know if there is some answer or solution. Ben Stern.email@example.com Thanks.
There are several reasons for smart matches to disappear . The smart matches are generated when you make a change in your family tree and publish them to your website. The data will then be compared with approximately 24 million other family trees at MyHeritage . Due to the fact that this takes some time it will take a few days days to collect the data and for large trees it can take longer.
The smart matching technology is very dynamic. It happens that in this "intermediate period" webmasters make changes in their family trees and remove individual cards and even entire trees. The result is that you have received a message that you have a smart match, but that the data has been removed. The result is an empty smart match.
If the publication of a tree is removed from a website then all the related smart matches will be removed as well. Both the smart matches in your website as the smart matches that have been confirmed and rejected by other webmasters.
When a new tree is published the system will generate new smartmatches for this tree and the whole process will start again, which will take time.
Another reason is that webmasters sometimes decide to change their site settings and turn the smart match system off. As a result all smart matches related to this tree will dissapear.