fix: 修复 prefetch true 行为

[kuitos]

resolve #556

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This change is 

[codecov]

Codecov Report

Merging #564 (910e927) into master (bdef990) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #564   +/-   ##
=======================================
  Coverage   46.01%   46.01%           
=======================================
  Files          67       67           
  Lines        1595     1595           
  Branches      435      435           
=======================================
  Hits          734      734           
  Misses        860      860           
  Partials        1        1           

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