Issue: Word Wise inline hints not showing for plural words (e.g., "guijarros") even though the lemma is recognized

[Coffee2rock]

I'm having an issue when generating Word Wise files for a Spanish book using the WordDumb plugin in Calibre.

I customized some Spanish words in the extension, one of them being the lemma "guijarro" (pebble). When I apply Word Wise on my Kindle, some words display their inline hints correctly, but "guijarros" (plural) does not show anything above the text.

I find this strange for a couple of reasons:

It only has one definition, so there shouldn't be any disambiguation issues.

If I long-press the word "guijarros" on the Kindle, the Word Wise dictionary popup does appear, correctly showing the Wiktionary definition for the lemma "guijarro".

My hypothesis is that the inline hint fails to trigger because the word in the text is in its plural form ("guijarros") while the lemma is singular ("guijarro"). The Word Wise seems to link them correctly when long-pressing, but the inline display doesn't catch it.

I've attached photos showing my Calibre setup, how it looks on the Kindle screen (missing the inline hint), and how the definition successfully pops up when long-pressing the word.

https://imgur.com/a/WfZfWFp

https://imgur.com/a/Wpjjyh8

https://imgur.com/a/wZpdBOQ

i´m using latest version

[xxyzz]

Maybe the definition is too long and Kindle's firmware decides not to display it.

Only modified EPUB file in koreader will display all enabled words but some words with long definition will take lots of place.