Standard sp game After first wave of Zirax attack 2nd wave didnt turn up, manual advance in pda. Sound of incoming attack energy spikes detected but again no Zirax. I currentlt plan to manually advance again.
Could not find an issue to be honest, but made a few fixes. As you are already in the midst of the mission, i would suggest to advance manually (as any update will not solve your issue as we cannot update running missions to that extend)