fix: Fix double counting of shuffle bytes written [WIP]

[andygrove]

Which issue does this PR close?

Closes #.

Rationale for this change

What changes are included in this PR?

How are these changes tested?

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.60%. Comparing base (f09f8af) to head (7416785).
⚠️ Report is 760 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2898      +/-   ##
============================================
- Coverage     56.12%   50.60%   -5.53%     
- Complexity      976     1178     +202     
============================================
  Files           119      167      +48     
  Lines         11743    15334    +3591     
  Branches       2251     2548     +297     
============================================
+ Hits           6591     7760    +1169     
- Misses         4012     6411    +2399     
- Partials       1140     1163      +23     

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