xwiki-platform-lesscss-default is flickering

[vmassol]

[ERROR] Failed to execute goal org.pitest:pitest-maven:1.4.10:mutationCoverage (pitest-check) on project xwiki-platform-lesscss-default: Mutation score of 86 is below threshold of 87 -> [Help 1]
seems to be a flicker, going to report it

There were no commits changing code in this module. Thus we think it's a flicker. I also cannot reproduce locally.

See https://ci.xwiki.org/job/xwiki-platform_pitest/665/console