Inline code additions are styled inconsistently in visual diffs.
In this edit, there's no green background on the code:
https://en.wikipedia.org/w/index.php?title=Wikipedia:Village_pump_(technical)&diff=next&oldid=1095695593&diffmode=visual&visualdiff=1&diffonly=1
In the very next edit, there's a "double-green" background:
https://en.wikipedia.org/w/index.php?title=Wikipedia:Village_pump_(technical)&diff=next&oldid=1095696788&diffmode=visual&visualdiff=1&diffonly=1