No way to create new tag if name is part of existing one

Let’s say there is existent tag Somebody, when I want to add new tag Body, it doesn’t show option to create one.
Workaround is to rename old tag, create new and then rename old one back.

You are right. This started after improving tag autocomplete.

By the way, an easier workaround is to create a tag with a modified name and then rename it. This will just require one rename.