When returning from the outer end islands ( approx. 10000, 4000) with a gateway portal and pearl, I was immediately thrown into the void and killed before I loaded in. A end stone platform was still generated, but I was placed a few blocks off from it.
It was easy to recreate this bug in a creative world, just remove all the end stone nearby an end gateway on the main island, then tp out to a gateway in the outer islands. Travel in, and you will be putt off a ways from the generated mini-island.
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Thank you for your report!
Sorry to hear you've experienced this, hope you didn't lose too much stuff.
We're tracking this issue in MCPE-48922, so this ticket is being resolved as a duplicate.
If you have any additional info you'd like to share with us, that'd be highly appreciated! You can do that by leaving a comment on the parent ticket.
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This bug could be fixed by placing the player on the obsidian platform instead of a generated end stone island.