Fix initial dual edge case

[kamesy]

No description provided.

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.50%. Comparing base (266312d) to head (30c6cd6).
⚠️ Report is 23 commits behind head on master.
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Additional details and impacted files

@@            Coverage Diff             @@
##           master      #62      +/-   ##
==========================================
- Coverage   87.57%   87.50%   -0.08%     
==========================================
  Files          12       12              
  Lines        4064     4064              
==========================================
- Hits         3559     3556       -3     
- Misses        505      508       +3     

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