Google vanished from default search options from 11.0.10 onwards

A user on the forum reported that Google is no longer present as a default search engine option in Tor Browser 11.5. tobrop and I have narrowed it down to 11.0.10, which is the first stable release in which it's missing.

I can't see anything that would explain it in the changelog for 11.0.10 however, so I'm guessing it's a bug.