Not receiving loot from Flame Levithan Hard mode

My raid team and I engaged and downed Flame Levithan on Hard mode last week (3-15-2023) when the kill happened, we still had 3 players and 1 vehicle left standing, we all then received the notice that we were joining a locked raid that was at 1/14 bosses killed. We did not receive any loot nor did we get the achievement. I have made a ticket and got a GM to give us all the achievement but was told there was no loot awarded for the kill and to report it as a bug.