It appears possible to generate cursed system notes

While going over Reference redactor removes links where it shoul... (#584587 - closed), I noticed the following system note:

image

That's a link to me. I didn't intend or mean to do that, or even notice it at the time.

It turns out it also happens for project references; both UserReferenceFilter and ProjectReferenceFilter cache based on the target object, but not according to whether custom link text is used!

Quick reproducer:

[test](@kivikakk)

@kivikakk 

[hmm... where'd the text go?](@kivikakk)

@kivikakk

Renders as:

test

test

test

test

Screenshot for posterity:

image

Edited by Asherah Connor