When i started a match their was often a lighting bug where lights would pop in and out at the beginning.
Another problem is on the map recharge, the problem is the bot controlled players on training often get trapped in the elevator section which is corrected when a player moves near which can become a nasty suprise
If you are encountering issues during the flight, please refer to the known issues list on https://aka.ms/HaloSupportInsider and submit tickets for issues not present.