In a recent update, Adobe seemed to change the fonts in Lightroom Classic CC. Now the font's when viewed (here in the keyword screen) don't appear to be aligned. In this case, all of the fruits are listed under the keyword 'fruit', but they don't appear to be aligned or nested properly due to the font. Same with food types, Chinese Food and Chestnuts aren't and shouldn't appear nested under Candy, but that's how they appear with the new font changes.
Greetings, Updates to Camera Raw, Lightroom Classic and the Lightroom Ecosystem products for Desktop, Mobile and Web, were released today and contain a fix for this issue. Please refresh your Creative Cloud application and install your update when it becomes available. Thank you for your patience.