Steps to reproduce:

On a clean, fully patched installation of eZ Publish 4.7 + eZ Find 2.7:

1. Started Solr service;
2. Created an article in language A;
3. Searched for article in Solr admin interface, got 1 result;
4. Created article translation in language B;
5. Searched for article in Solr admin interface, got 2 results, 1 for language A and 1 for language B;
6. Deleted article translation for language B;
7. Searched for article in Solr admin interface, still got 2 results, which is wrong;