How to reproduce (on enwiki):
Assumption - Relevant code from en:Module:Infobox
local function renderTitle()
if not args.title then return end
root
:tag('caption')
:addClass(args.titleclass)
:cssText(args.titlestyle)
:wikitext(args.title)
endNow given the input:
{{Infobox|title=Wiki [[File:Wiki.png|left]]}}
We expect an infobox table with caption
Wiki <div class="floatright"><a href="/wiki/File:Wiki.png" class="image"><img alt="Wiki.png" src="//upload.wikimedia.org/wikipedia/en/b/bc/Wiki.png" data-file-width="135" data-file-height="155" width="135" height="155"></a></div>
Actual
A table with caption
Wiki
and the div is outside the caption/table element.