In the linked article, the content is not cleared after floats of the tables when using the template {{-}} which transcludes as:
<br style="clear:both;">

This is caused by the inline-block behavior of .ve-ce-mwTransclusionInlineNode

Version: unspecified
Severity: minor
URL: https://en.wikipedia.org/w/index.php?title=List_of_top_100_Major_League_Baseball_strikeout_pitchers&oldid=608135239
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=57372