In T271473#6732450, @Isarra wrote:

Yeah, that was dumb, should have tested better before deployment. Sorry, guys.

Tagging as high due to Izno reproducing the issue and crucial infobox templates being affected across the whole of the wiki.

In T271177#6723203, @Isarra wrote:

Is this using VE/NWE 2017? And with/without codemirror or any particular editarea-affecting gadgets?

Good job Isarra, thanks for the quick fix!

Patch fixes image overflow issues confirmed via compiling less -> css and trying it out as user css for Timeless. Message box templates rendering correctly. Recommend patch for publication.

Here's some screenshots from various template boxes in this class which implement {{mbox}} (or, more-specifically, the {{Message box|mbox}} Lua module)

In T269970#6686164, @Isarra wrote:

But seriously, keep the weirdness coming, man. This is really helpful!

I've also just discovered it applies to {{mbox}} as well, since they both are invocations of the same Lua backend. The difference with mbox is the text vanishes, not the images.

In T269970#6685817, @Isarra wrote:

Appears to be a problem with the css to stop images from overflowing the content, as setting a max-width to a percentage value inside a table cell results in a width of 0 because tables are stupid.

While I'd love to give you (or really, whoever made the template) crap for using tables for non-table formatting, this is also going to be an issue on any actual info tables that happen to involve images anywhere, and thus this has helpfully highlighted the issue for us.