fix: Replicator backfill drops documents

[nasdf]

Relevant issue(s)

Resolves #4822

Description

This PR adds a reproducible test for the issue but does not yet address it.

Tasks

• I made sure the code is well commented, particularly hard-to-understand areas.
• I made sure the repository-held documentation is changed accordingly.
• I made sure the pull request title adheres to the conventional commit style (the subset used in the project can be found in tools/configs/chglog/config.yml).
• I made sure to discuss its limitations such as threats to validity, vulnerability to mistake and misuse, robustness to invalidation of assumptions, resource requirements, ...

How has this been tested?

Added a reproducible test.

Specify the platform(s) on which this was tested:

• MacOS

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 67.88%. Comparing base (04a2d1e) to head (0a5fe22).
⚠️ Report is 6 commits behind head on develop.

❗ There is a different number of reports uploaded between BASE (04a2d1e) and HEAD (0a5fe22). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (04a2d1e)	HEAD (0a5fe22)
all-tests	2	1

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #4823      +/-   ##
===========================================
- Coverage    76.28%   67.88%   -8.40%     
===========================================
  Files          537      537              
  Lines        44068    44166      +98     
===========================================
- Hits         33615    29980    -3635     
- Misses        7859    11709    +3850     
+ Partials      2594     2477     -117     

Flag	Coverage Δ
all-tests	67.88% <ø> (-8.40%)	⬇️

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see 167 files with indirect coverage changes

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