I have, in fact, seen false positives on some of the inline citation suggestions, typically where someone inserted some sort of elaborate formatting (such as a formatted table) inside a pair of <ref>...</ref> tags. Although the citation and the rest of the profile display as intended, a suggestion may be generated.
I have marked some of these as FALSE suggestions, but personally I would much prefer it if people did not attempt fancy tricks in their inline citations. One reason is that this practice makes it extremely difficult for most other members to edit the profile.