Rights applied for a group are not updated after multiple renames of the group page

• Add a right in a page A for a group B
• Rename the group B to C
• Go back in page's A "Page Administration" and see that group is updated and the the right is preserved
• Rename again the group C to D
• Go back in page's A "Page Administration" and see that group is updated and the the right is not preserved
• Rename back the group D to Group C
• Go back in page's A "Page Administration" and see that group is updated and the the right that was previously missing is visible again.

Meaning that the rights are not gone but not properly updated after a second rename of the group page.