Happened yesterday.
After saving and reloading our recently converted world, I found myself unable to use the nether portals we had setup.
They would wave and distort my vision as normal and just sit there doing nothing. I could walk out and it would stop, I would walk back in and it would wiggle and move like normal again but never teleport me to the nether.
I tried sleeping, walking away, giving it a few minutes, and nothing worked to remedy it. We had to reload the world and then I was able to teleport in.
Thank you for your report!
However, this issue has been closed as Cannot Reproduce.
We were unable to reproduce the problem you are describing in the latest version. Please add more information or a create a new ticket if this is still an issue for converted worlds in the latest version.
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