Halo Wars 2 Co-op Mission: Under the Dark. Broken

Me and my friend were doing this mission on legendary and after nearly 1 and a half hours playing due to many over powered glassing beams we got all 3 Kodiaks placed. We were happy. But then nothing happened we just looked at the screen. we were still looking at the battlefield. all three Kodiaks turned yellow and were in place, but they were not in the launching form. so I pressed Y on all of them but nothing happened. so they were just froze and we could not move them. we were both really disappointed. We tried to then restart the mission and nothing would happen when we tried to restart it, it went through the mission briefing then said press A to continue. We both pressed A and nothing happened. Then here I am now reporting this issue. Please fix game breaking bug.

My Username is CLH CHIEF