https://geohack.toolforge.org/geohack.php seems to use the Monobook skin, and the <div role="search" id="p-search"> element supposed to only have the width of the sidebar that it is part of now seems to take the whole width and cover other content.

This happens in any language, e.g. https://geohack.toolforge.org/geohack.php?language=cs&params=52_21_40.0_N_4_52_25.0_E_type:landmark_scale:3125_region:NL&pagename=Vondelkerk&title=text_coordinates

This does not happen on wikis though when using the Monobook skin: https://en.wikipedia.org/wiki/Santiago%E2%80%93Rosal%C3%ADa_de_Castro_Airport?useskin=monobook

Looking at the HTML source, replacing <div role="search" id="p-search"> with <div role="search" class="portlet" id="p-search"> would fix this.

Per https://www.mediawiki.org/wiki/GeoHack#Source_code, this needs to be reported at https://github.com/magnusmanske/geohack/issues/2 as the Geohack project does not use Wikimedia Phabricator to track its issues.

@Draceane this is not a MediaWiki or WMF problem. This is a problem in the tool of a community member. The tool extracts part of the page and reuses that. That makes it very vulnerable to problems like this.

No one here can fix it, other than Magnus, who is the maintainer of that tool. As stated before, this is tracked via https://github.com/magnusmanske/geohack/issues/2

The Javascripts change should not be needed, the page itself should not even have these user interface elements.