I had this happen to me just now on the Xbox One Bedrock 1.4.2 version.
I had died just outside outside the tower circle. I wasn't that far away. Came back and he was floating/hovering on the far side about a block above the ground.
I got to hit him once and then nothing. I left using the now open portal and came back. Then nothing. He disappeared and now I got an egg showing up. I did not however get the little portal to go to the end city.
I did not receive any achievements, exp or the chance to get dragons breath.
I had this happen to me just now on the Xbox One Bedrock 1.4.2 version.
I had died just outside outside the tower circle. I wasn't that far away. Came back and he was floating/hovering on the far side about a block above the ground.
I got to hit him once and then nothing. I left using the now open portal and came back. Then nothing. He disappeared and now I got an egg showing up. I did not however get the little portal to go to the end city.
I did not receive any achievements, exp or the chance to get dragons breath.