fix: v2 writer used the wrong value to calculate how many rows were available in array

[westonpace]

No description provided.

[westonpace]

Need to add some unit tests for regression before this is merged probably.

Regression test added

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.53%. Comparing base (d1f7d3d) to head (2258c63).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2704   +/-   ##
=======================================
  Coverage   79.52%   79.53%           
=======================================
  Files         227      227           
  Lines       66754    66756    +2     
  Branches    66754    66756    +2     
=======================================
+ Hits        53089    53094    +5     
  Misses      10538    10538           
+ Partials     3127     3124    -3     

Flag	Coverage Δ
unittests	79.53% <100.00%> (+<0.01%)	⬆️

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