You used to be able to tell what snowball you'd been hit with and how many times by just looking at your HA. I'm not wearing a Shield, but most of the time they just don't show up or stay very long if they do.

Do you get multiple messages if you've been hit more than once nowadays, or do all hits count as one message?

It seems like most of them don't actually work. I've noticed that, too.

I saw some of them showing up earlier in the season. I think maybe the problem now is the issue with HAs not updating in the wardrobe. They're not updating when you get hit by snowballs either, it seems.

I threw some snowballs on the second day we could this winter.... I wanted to see what snowballs looked like, so I checked the HAs of the people I lobbed them at, none of them had the snowball effect on their HA at all :( (and when it rebounded on me because of their shield, my HA still didn't get the snowball on it) :(