If in the AI-squad (for example, it is a tank platoon) there are repair-specialists or engineers and there is a damaged tank (or other vehicle), then after damage the AI-commander of this squad will order the repairman to repair the vehicle! This is good, but if the damaged tank is destroyed before the repairman will accept this order and will responds - "I understand", then this voice-command gets an endless loop on this order. Example --> https://www.youtube.com/watch?v=5dOx15A5W6Q&feature=youtu.be
It is impossible to stop and player just need to restart the mission.
Important detail - the repair AI-order works instantly as soon the tank gets damaging, it does not even have a one second delay and this feature looks not only absurd, this can cause such problems. If the tank has critical damage hit (it should explode in a few seconds, but has not yet exploded), then the order for repair is not needed. Perhaps a small delay for any AI repair-orders can solve this problem, since, after critical damage, the tank will have time to explode.