T67444 caused a regression such that the ULS cog is positioned incorrectly in the sidebar. @Nikerabbit is looking how to fix this, but he might need help figuring out how to make the positioning more generic, or how to detect presence of this change reliably, or have this change reverted before next deployment train if no fix is ready at at that time.
https://en.wikipedia.beta.wmflabs.org/wiki/Language_test
Before:
After: