We got the feedback that when hovering over a footnote (for example [1.1]) only the page number is shown on the tooltip; the initial source is missing. This makes is complicated for the user to understand to which initial reference the cite extension is referring to.
Feedback was given on: https://meta.wikimedia.org/wiki/WMDE_Technical_Wishes/Book_referencing/Call_for_feedback_(May_2018)