Kagi Translate on Firefox desktop: Top half of Japanese furigana in right pane is hidden

MikeB

Open Kagi translate in Firefox (desktop).
Select English-to-Japanese translation.
On the left translation pane (English), enter a common phrase to translate.
On the right translation pane (Japanese), enable furigana.
See that the top-half of all furigana above the kanji characters is hidden.

This occurs in Firefox desktop browser on both Mac OS and Windows 11. I did not observe this issue in Safari. I do not use any other browsers.

Furigana text is fully visible.