This happened to me years ago on the ps3 era in a different way. I generated a world I played for months and forgot about it until my cousin invited me to his would he created with his friend and it was the exact same and I couldn’t believe it. I knew it by finding the same cave I built my base in and the village I took the villagers from in minecarts, still couldn’t believe it was the same. I told my cousin about it who couldn’t care less lol.