Hi,
After further research, it appears there were some global-scale highways added with childish names.

The changes were spotted and removed very quickly, however the global scale of database -> tile rendering -> regional cache servers mean "ghosts" of the removed data may have appeared for some hours afterwards randomly.

One bad way only appeared to me today at one zoom level, and transected this point, giving me an insight into your note.

Checks on the data yesterday didn't see the change (it was truly GLOBAL so no local changes were made), and already removed.

So - thanks for your report, and hope you understand my scepticism at the time!
Happy Mapping,


James