I already reported. I hope the creator fixes this soon.
https://forum.dcs.world/topic/302755-m03-mission-completed-alert-before-mission-starts/#comment-4989061
I don't know why but after sitting in the cockpit, the message "mission completed" appears and my wingman does not start the taxi and take off.
I'm running version DCS 2.7.15.25026 Open Beta.