Prevent deregisterElement from deregistering twice in nested object

[justiceHui]

What this PR does / why we need it?

• Prevent the deregisterElement function from deregistering twice in the nested object.
• Improve time complexity of deregisterElement function $O(2^n)$ to $O(n)$ when $n$ is number of elements to deregistered.

Any background context you want to provide?

Refer to issue #715 for details.

What are the relevant tickets?

Addresses #715

Checklist

• Added relevant tests or not required
• Didn't break anything

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (48c3ccb) 81.76% compared to head (1056e07) 81.77%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #716   +/-   ##
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  Coverage   81.76%   81.77%           
=======================================
  Files          57       57           
  Lines        4162     4164    +2     
  Branches      805      805           
=======================================
+ Hits         3403     3405    +2     
  Misses        502      502           
  Partials      257      257           

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[chacha912]

Thanks for your contribution.
Looks good!

[hackerwins]

Thanks for your contribution.