Screenshot: current behavior
The element
<select class="api-sandbox-input" name="query" id="api-sandbox-query" multiple="">
in the link above is now too small vertically, and requires a lot of scrolling.
Inspecting the element and removing the 'multiple=""' makes the height to go back to normal.
Version: unspecified
Severity: normal
URL: https://en.wikipedia.org/wiki/Special:ApiSandbox#action=query&list=abusefilters&format=json&abflimit=10
Attached: