Oceanic8

Can confirm fixed with 1.20-pre6 generated worlds

• If you update your world to 1.20-pre6 (or release version when ever that happens) You will need to kill the dragon atleast 20 times again. I had 15 portals active, updated, on tries 8,12, 15,17, and 20 my last 5 portals were spawned in.

*I did this in a back up of my world and then just copied the 1.20-pre6 DIM1 file to the 1.19.4 save file and its worked fine. so atleast i now can start my end project.

Thanks  [Mojang] Panda, you're the best

1.20 Pre-release 1 bug still exists however there is a new bug that does not happen in 1.19.4

If you spawn the dragon and then quit the game, when you rejoin and kill the dragon the entity is removed but the health bar, fog-of-war are still there. You cannot summon or /kill as 'entity does not exist' and the end portal hasnt spawned allowing you to summon a new one

I can confirm that Brian81505 method below is accurate to reproduce. my world which is now (unfortunately) 1.19.4 with 14 Gateways will no longer generate any more. Reverting a 1.19.4 world back to 1.19.3 does not fix this problem

However 1.19.4 generated worlds also will only create Gateways up to when you log out. As soon as you log out it stops generating.

My theory is that this is a problem with loading a 1.19.4 world. When killing the next dragon it doesn't remove an entry for the "World" > level.data > DragonFight > Gateways * entries
Since it doesn't go down in numerical value it's not correctly identifying the dragon is killed and it needs to spawn a gateway at the next location at the bottom of the list.

Do not use 1.19.4 if you want to spawn all gateways.