Highlighter has lost usefulness

[neognomic]

I use Opera desktop, a Chromium browser, on MS Win 10. Highlighter, installed via Chrome Web Store, has been reliable and helpful. I like the simplicity quite a lot(tho' do wish for more colors). Thank you for making it available.

However, "Highlighter" stopped working properly a few weeks ago(Sep 2021) and extension is still broken: a)Won't separate individual text highlights for copy and instead copies all highlights on a page. b)Forces all highlights to be same color when the color is changed for one highlighted text section. The latter is quite irritating since there is no work around and I use the colors to indicate level of importance and to make scanning the text later for important points easier/faster. Those two issues make it functionally useless for me.

Also, c) months ago it began highlighting some text that I never highlighted on certain web pages. It appears random but M/B position related as sometimes only part of a sentence is highlighted and the color is inconsistent with other nearby text. AFAICT, the text that gets highlighted is new text that was not present the last time I visited the page. The pages are web pages that are updated regularly(several times a week), as well search engine pages; have never seen that occur on any other type of page. Notably, Text that I did highlight in sections that have not changed remains as was originally highlighted.

Thanks for listening and please fix, IYC.

UPDATE:
I just tested it with Edge 94.0.992.50 browser.
The individual section copy works, and "Copy All" separates the paragraphs but has no bullets. The individual section colorization highlighting is working w/o changing all other sections also.

I don't/won't use Edge, except as a second source to see if Opera is crazy or it's me, :).

Anyway, these issues seem to be only specific to certain chromium based browsers, Opera in particular.
I still need it fixed if you can. I cannot as my javascript skills are ancient.