Okay, when will it be fixed? No update for me yet.
I think it has to do with natural mob despawning mechanics. I’ve noticed that if you can get to the dragon fast enough it won’t despawn. It will also despawn if you get too far away.
On an unrelated note, the gear you’re using in that picture is unreccomendable.
I have been having the exact same issue on my Apple iPad. I noticed that if you get to the dragon fast enough it won’t despawn. It will also despawn if you get too far away.
I’ve been having the same issue. If I don’t get to the dragon fast enough it will freeze in place. The gateway portal appears and the return portal activates as if it had been killed. The dragon also despawns when I get to far away. I first noticed the glitch on bedrock edition when update aquatic was first released.
If you respawn the Ender Dragon manually it doesn’t despawn. But it’s still better just to wait for a fix.
I suspect it will be when Update Aquatic Phase 2 comes out or sooner.