Groovy files isn't viewable in Catalina

[Lucas3oo]

Environment

• App version?
  1.2.4
• macOS version?
  Catalina 10.15.5

Bug Information

• What are you trying to do?
  View groovy code.
• What's the expected behavior?
  See the content of the groovy file
• What's the actual behavior?
  No preview at all.

Checked the type:
mdls -name kMDItemContentType tmp/CreateDockerImageTask.groovy
kMDItemContentType = "dyn.ah62d4rv4ge80s6xtr75hw"

In Info.plist dyn.ah62d4rv4ge80s6xtr75hw is missing. Instead there is org.codehaus.groovy-source for groovy.
So maybe this works on other versions of macOS.