I actually don't know how to explain this, but the first minimize link for each top tier comment isn't working properly. It doesn't minimize that comment, it just minimizes the comments below it (not inside it). This was working fine before the updates to spectrum a few days ago. Here's an issue council for this: https://robertsspaceindustries.com/community/issue-council/spectrum/SPT-41857-Nested_Mode__Can_t_minimize_first_tier_comment_replies