Fix issue with map chunks

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 97.80%. Comparing base (a583315) to head (ccd4d56).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #64 +/- ## ========================================== + Coverage 97.79% 97.80% +0.01% ========================================== Files 7 7 Lines 726 730 +4 Branches 164 165 +1 ========================================== + Hits 710 714 +4 Misses 13 13 Partials 3 3 ```

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