When updating for xwiki-21597, I didn't notice the special case for unregistered users. It's instantiated at https://github.com/xwiki/xwiki-platform/blob/3707ae31211e2524969cca89808dbe1ae5a044b5/xwiki-platform-core/xwiki-platform-flamingo/xwiki-platform-flamingo-skin/xwiki-platform-flamingo-skin-resources/src/main/resources/flamingo/rightsUI.vm#L343-L347 , very dependant on the value of the variable `r` which is defined here: https://github.com/xwiki/xwiki-platform/blob/3707ae31211e2524969cca89808dbe1ae5a044b5/xwiki-platform-core/xwiki-platform-flamingo/xwiki-platform-flamingo-skin/xwiki-platform-flamingo-skin-resources/src/main/resources/flamingo/rightsUI.vm#L132-L149

From what I can see, there is barely any comments and the variable names are too short to convey any info.
I'll update the codestyle here as well as provide a fix for the issue.