Right, I've managed to cheat and give myself some obsidian to make yet another portal. Teleported back home. Went back in to the Nether, and end up about 16 blocks away from the new portal (with no other portals). this may have been where my original portal was that disappeared. The latest portal is working OK.
That was a few days ago, but as far as I can remember I closed the game in the normal way - save and quit.
(edit) - remember that the portal that has now disappeared is the one that I rebuilt after the first bug.
🙂 - ok I'll rename it back! No, I didn't delete it before the update.
Thanks, I have renamed the DIM-1 folder and restarted Minecraft, but this hasn't brought back the portal.
Thank you - files attached now.
apologies - and thank you for the pointer, @Greymagic27. Will do.
It’s not just Switch version. I’ve noticed it on the Windows version as well.