Find children broken

[ggarra13]

Link the Issue(s) this Pull Request is related to.

Each PR should link at least one issue, in the form:

This is a test for issue #1652. It does not fix it. It just adds a test for it.

Summarize your change.

Added a test_find_children.cpp that shows the problem.

Reference associated tests.

test_find_children.cpp.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.91%. Comparing base (eaf8569) to head (82c98c6).
⚠️ Report is 87 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1653   +/-   ##
=======================================
  Coverage   79.91%   79.91%           
=======================================
  Files         197      197           
  Lines       21731    21731           
  Branches     4339     4339           
=======================================
+ Hits        17366    17367    +1     
  Misses       2213     2213           
+ Partials     2152     2151    -1     

Flag	Coverage Δ
py-unittests	79.91% <ø> (+<0.01%)	⬆️

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see 1 file with indirect coverage changes

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[jminor]

It looks like this was covered by #1766
Feel free to reopen if I've misunderstood.