I actually where able to get the glitch recorded, but it happened just like mrmountain said, i got teleported back twice with some pressure plate sound, hm...
I asked this a long time ago in the minecraft java speedrunning discord and they said that it has something to do with the game configs and command blocks? it happened to me sometimes and it looks like its more of a luck factor
actually,there already are seeds with the full end portal,set seed would be boring so random seed may be better to watch
after entering in the end there are 2 end portals,i was curious if i could enter in the first one
lmao,i was tryng weeks to do this new ender portal route,and before you write this on forum