Wikimedia Bugzilla is closed!

1) Open an article such as
https://en.wikipedia.org/wiki/Convex_function?veaction=edit
2) Click in a non-linked word "function"
3) Click in the link button (CTRL+K)

The list of matching pages will include the disambiguation page "[[Function]]", which should actually be avoided.

Similarly, if a paragraph already has a link to [[Function]], then it should not appear in a second atempt to add the same link (or there should be some visual indication that this kind of link is not desirable - e.g. by having a section in the dropdown menu labeled "Already used links...")