Groovy analysis displaying false positives

Hi!

I noticed that IntelliJ IDE groovy editor (2019.3) has been displaying some false positives for the code analysis.

One example is shown on the attached image. Although the 'itemFile' is declared as immutable, the IDE still complains. The code is accepted by the groovy compiler (2.5.8).

Would this forum be the right place for this issue?

Best regards,

Daniel Felix Ferber