Wiki Macro loses its PR and becomes unregistered

This issue (if it really is an issue it will be hard to track down)

-Steps to reproduce:

• Login as Admin, create a user and give him PR
• Logged in with the newly created user and I created a Wiki Macro containing some groovy.
• Macro characteristics:
  • Supports inline mode: 1
  • Macro Content Type: Mandatory
  • Macro Visibility: Global
• Wait around, and the macro will stop working.

The macro worked some time, but suddenly stops working. I've got a error, saying it was unregistered.

The document was not saved in the meantime by anyone. Neither by me (the author)

This happens on a XWiki Enterprise 2.7.33694 so my guess is that newer versions are affected as well.