Artefact from a wrapfigure lingers far below it

[lean grail]

,ctan wrapfig

[halcyon bluff]

wrapfig – Produces figures which text can flow around

Allows figures or tables to have text wrapped around them. Does not work in combination with list environments, but can be used in a parbox or minipage, and in twocolumn format. Supports the float package.
​ ​ ​ ​ ​ ​ Sources: /macros/latex/contrib/wrapfig
Documentation: How to use wrapfig to span multiple columns, Package documentation
​ ​ ​ ​ ​ ​ Version: 3.6
​ Contained in: TeX Live as wrapfig, MiKTeX as wrapfig
​ ​ ​ ​ ​ ​ ​ Topics: Text flow
​ ​ ​ ​ ​ See also: wrapfig2
Read more at CTAN page of the package.

[lean grail]

per the documentation, the first optional argument is the number of lines the figure takes up (too many by default). change it to something more reasonable