It seems the docs for query container are missing the actual code/previews on the examples.
Just updated the title, it appears ALL components examples are broken.
Hey @Luke 
thanks for flagging this, and for updating the title once you spotted the wider pattern.
This should be sorted on our end now. The examples on the query container page are rendering again, both the code blocks and the live previews.
You were right that it wasn’t just that one page. A batch of the app home web component examples had dropped out of the docs build around the same time, and those have all been restored, so the neighbouring component pages should be back too. A hard refresh should clear anything still cached on your side.
If you still see blanks on any page after refreshing, let me know and I can take a look.
Hope this helps!