[Backport into 5.20] Fixed Stale External Connection on Endpoint Change

[VershaAgrawal]

(cherry picked from commit d7a7df6) (cherry picked from commit 3478514) (cherry picked from commit 3d43143)

Describe the Problem

https://redhat.atlassian.net/browse/DFBUGS-8001

Explain the changes

Issues: Fixed #xxx / Gap #xxx

https://redhat.atlassian.net/browse/DFBUGS-8001

Testing Instructions:

• Doc added/updated
• Tests added

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