Bad kerning in entry editor type label

[madmini]

The entry type label (vertical banner on the left of the entry editor) has bad kerning: Article is displayed as Artide and letter spacing is off for many other letter combinations as well (depending on the font-size).
This happens with the default theme and font-size on JabRef 5.15 and 6.0-alpha.1 and when building from source (main @ c6e317d) on Windows 11.

Workarounds
The text displays better (at least no cl=>d) when overriding the default font-size (9) to 10 or higher.
Similarly, in the theme Base.css for #entryEditor #typeLabel changing -fx-font-size: 1.166667em; to 1.2em also fixes this particular issue (but makes the vertical banner wider).
JavaFX does not seem to support letter-spacing, as adding -fx-letter-spacing does not work.
Another (hacky and not too pretty) workaround could be to insert hair spaces (U+200A, zero-width spaces do not work) between letters for this label: .replaceAll("(.)","$1\u200A").

Possible Cause
This seems like a bug in JavaFX as removing rotate="270" in EntryEditor.fxml fixes the kerning (and strangely, for rotate="90" the kerning is not as bad, but still off).