I was playing minecraft bedrock trying to defeat the ender dragon and when I finally did i didn't get the achievement! Btw I also didn't get the “ooh shiny” achievement. So now I can't prove that I beat the game to my friends
Ps i dont know what version I am on so I just pressed one. sry
I also had this issue on PS5 on 1.21.90. Our world was created before the Nether Update, and we have killed the dragon 20+ times already before respawning and killing it again.