M03 - Wingman does not re-attack tank with GBU12

[Aerovenator]

Today I got stuck in M03, when my Wingman was tasked with destroying the tank (after the gundish task and I had no GBUs left). His first GBU-12 hit and he was tasked to re-attack. But instead the wingman ist just circling. The mission then is completely stuck.