Some replies not showing a notification

I don't know what this is about and if it's a new thing but I saw a reply to one of my comments not showing a notification and being marked sensitive. I'm wondering how many comments I've missed like this.

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SW-User

Because everyone is so moody because hateful intense propaganda is flooding everyone's phones and causing mass hysteria the media likes to do this when Trump is in office. I went 4 years without seeing politics on facebook now it's unusable because of it. These people are going mad and it cuases them to reply more hateful and the replies get hidden

NerdyPotato ·

@SW-User I've noticed this for months, if not 2 years. It has nothing to do with Trump being in the Whitehouse.