In PowerShell/PowerShell#13396 we saw codefactor-io report 3542 fixed issues, that were not changed in the PR and in actual fact are unresolved in the master branch. We've been seeing many issues like this in the last month or so, but this is the most extreme case by far.

The cause of this issue might be that the project recently started using C# 9.0 features, like new and, or, and not keywords for pattern matching and target-typed new expressions and codefactor-io does not yet support C# 9.0, or is using old version of StyleCopAnalyzers.

See also: #26.