Now that MARC batch importing uses the background job system, after one imports a staged MARC batch one needs to follow a link over to the completed background job and then another link back to manage-marc-import.pl for the batch you've just imported. Previously, importing a batch simply re-loaded manage-marc-import.pl in order to show the imported bibs. We should either restore this exact behavior or at least make sure that the completed process bar page contains a link directly to the imported batch.
I believe the patch on bug 31891 also fixes this. *** This bug has been marked as a duplicate of bug 31891 ***