I am trying to generate a coverage report for my Angular tests using Karma.

I implemented a pipeline that simply runs ng test --watch=false --code-coverage=true

Every now and then, using the same VM, the same agent, etc., I get different results. Sometimes everything is fine:

Other times, no coverage folder/files are generated and I get this:

Does anyone have any idea what is happening and why sometimes it works and other times I get “Executed x of 0”?

Random seed is disabled

I tried changing the karma.conf.js file, I used different templates that I found online, besides that I have no idea what is happening.