Fix loading an extra element when not necessary

[Baptouuuu]

Problem

Same as #39 but with a deferred Sequence.

Solution

Same one

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.51%. Comparing base (6ebe96d) to head (278059b).
Report is 2 commits behind head on develop.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop      #40      +/-   ##
=============================================
+ Coverage      98.40%   98.51%   +0.11%     
- Complexity      1084     1085       +1     
=============================================
  Files             76       76              
  Lines           4768     4787      +19     
=============================================
+ Hits            4692     4716      +24     
+ Misses            76       71       -5     

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