Throwing an ender pearl into an End Gateway Portal (the one that takes you to and from the outer islands can spawn players in a position where they will immediately fall into the void and die (this just happened to me on my hardcore world I've been playing for 150 HOURS!!!!!!!!!!!!!). I couldn't see where i was initially spawned in but I assume it was either on an air block or on the side of a block. I threw a pearl into the gateway after a long trip through the outer islands and immediately fell into the void and died, losing my entire world and weeks of playtime through no fault of my own.

To re-create:
Defeat the ender dragon
Use the portal to get to the outer islands
Return through the portal
There's a chance you will not spawn on solid foothold especially if the portal was generated away from the land.

Please fix this urgently and make the portal spawn you on a solid block, I'm nearly in tears over this