devtrackers.gg
Hey Folks!
Everyone had a bit of a panic moment there but just to let folks know this is not a bug, this is just a regular broadcast and is not a world first broadcast as completing tier 10 is quite the achievement like hitting 200m.
This group is an unranked Regular Group Ironman which would be why they have been able to get this achievement done (and why there hasn't been other popups for the other achieves).