Tricky to explain exactly. Sometimes the comment button goes straight to adding a new comment rather than the post’s comments. To reach the comments I have to press it again. But because it’s not consistent sometimes I have to press it several times to reach the actual comments.
Actually I think you are right, I just tried again and noticed clicking anywhere but not on the icon has a different action compared to clicking on the icon. So I was slightly wrong but it does seem that because the icon is small means it is easy to actually ‘miss’ it and instead end up with the wrong action.