Pretty minor, but the reply button gets shrunk a lot more while getting hidden compared to the notifications button:
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I’ve noticed this recently too! It’s definitely a little annoying. I’ll take a look when I get a chance.
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I’ve got a fix in, it’s live here on Meta and the transition is much smoother 
https://github.com/discourse/discourse/commit/28d5a3f21f60c6aae3c5c5f2e267e063dab2331e
إعجابَين (2)