Nether portals

Does MCPE-151181 describe your issue?

Not exactly, no

Not exactly, no

Your report does not contain enough information to understand or reproduce the problem.
To help in confirming your report, please add the following information to the Description, as shown here:

Steps to Reproduce:
1. (list every step completely, so someone else can reproduce the issue)
2.
3.
Observed Results:
(briefly describe what you see happen, including any message(s) shown)
Expected Results:
(briefly describe what should happen)

Try following your steps to make sure you include everything and can still reproduce the issue yourself.

Please include the world seed, and specific coordinates of each portal

Screenshots and videos are also helpful, though they should not be used as a replacement for the above information

This report has been temporarily resolved as Awaiting Response. It will automatically reopen when you add information. Please follow the format shown and include all sections (steps, observed, expected). Reports that do not contain all of the requested information and complete steps to reproduce the issue may be closed as Incomplete.
Please review the Bug Tracker Guidelines before creating additional bug reports.

Many players find this Bug Report Creation Form useful for filling in all helpful information.

Your report does not contain enough information to understand or reproduce the problem.
To help in confirming your report, please add the following information to the Description, as shown here:

Steps to Reproduce:
1. (list every step completely, so someone else can reproduce the issue)
2.
3.
Observed Results:
(briefly describe what you see happen, including any message(s) shown)
Expected Results:
(briefly describe what should happen)

Try following your steps to make sure you include everything and can still reproduce the issue yourself.

Please include the world seed, and specific coordinates of each portal

Screenshots and videos are also helpful, though they should not be used as a replacement for the above information

This report has been temporarily resolved as Awaiting Response. It will automatically reopen when you add information. Please follow the format shown and include all sections (steps, observed, expected). Reports that do not contain all of the requested information and complete steps to reproduce the issue may be closed as Incomplete.
Please review the Bug Tracker Guidelines before creating additional bug reports.

Many players find this Bug Report Creation Form useful for filling in all helpful information.

MCPE-151181 is what you're describing. Specifically, the lack of a POI system causes this issue:

• Portals use the POI system to cache links, meaning two portals that are linked will stay linked until one of the portals is destroyed