Renaming tags and adding "," to split tags does not work anymore
>The calibre version
>The operating system you are running calibre on
If you try to rename a tag in sidebar (right clicking on a tag and selecting "Rename …", for example, "Historical Fiction" and try to split it in two tags to simplify, for example "Historical" and "Fiction", by adding a "," this does not work anymore.
In v1, the tag shows up as "Historical, Fiction" and if you edit metadata of a book with that tag and just click OK, the tag will split into "HIstorical" and "Fiction" and "Historical, Fiction" will disappear from tags.
For years, calibre allowed tag renaming & splitting from the sidebar and something broke in v1. Now it doesn't split them anymore and causes unintended consequences once you edit metadata.