sindresorhus/refined-github
The issue has been solved
Reaction avatars not enabled for hidden items #1888
Loilo posted onGitHub
Room for slight improvement: If an issue has a lot of comments, GitHub will snip some of them in the middle and fetch those on demand, as can be seen in sindresorhus/eslint-plugin-unicorn#169.
If those are expanded, their according reactions will not have avatars.