Enter nether portal from overworld. Enter nether. Re-enter the portal from nether to return to overworld. New nether portal is created in a different location from original portal.
I would then destroy an obsidian block to the newly created portal, travel back to the original nether portal and repeat the process. A new portal would be created every time (within the same area; see screenshots).
I saved a backup of my server/game before the update, reloaded that file and still had the same issues.
Thank you for your report!
However, we are already tracking this issue, and this report is a Duplicate of MC-116881, which has been marked as Works as Intended - this is an intentional game feature. If you have a different opinion, please visit the Feedback website.
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