Hello Diana,
Thanks for joining the community, and for raising this issue!
It seems that you are using the FindBugs third-party analyzer. As mentioned in our FAQ:
Third party analyzers are not executed in SonarLint
Some issues may be reported in SonarQube by a plugin leveraging a third party analyzer (PMD, Checkstyle, ESLint, PyLint, …). SonarLint will only run rules from SonarSource analyzers including custom rules extending SonarSource analyzers . Third party analyzers usually have their own IDE integration, so we have no plan to run them in SonarLint.
Hope this answers your question.
Thanks again
Damien