fix: crash with thread-loader

[alexander-akait]

This PR contains a:

• bugfix
• new feature
• code refactor
• test update
• typo fix
• metadata update

Motivation / Use-Case

fixes #1280

Breaking Changes

No

Additional Info

Ideally should be fixed on thread-loader side, but in long term multiple threading will be part of core, so fix is good right now

[codecov]

Codecov Report

Merging #1281 (f335480) into master (e194e6b) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #1281   +/-   ##
=======================================
  Coverage   99.46%   99.46%           
=======================================
  Files          11       11           
  Lines         753      754    +1     
  Branches      258      259    +1     
=======================================
+ Hits          749      750    +1     
  Misses          4        4           

Impacted Files	Coverage Δ
src/utils.js	98.77% <100.00%> (+<0.01%)	⬆️

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