Yesterday and today I've noticed that when I "like" an HA, the heart turns pink as usual but if I refresh the page, it goes back to normal/unliked. No idea if the count is actually going up for users (I don't have any likes today myself but that's normal since I don't really post a lot) but it appears to me as though my likes just aren't sticking.
I've tried several times (different users) and waited a while before going back and checking again to be sure it's not just lagging (or that I'm undoing previous likes, I made sure to like some HAs I definitely hadn't seen before).
Win10/Opera GX
ETA: My dashboard shows that I have a "like" now (thank you) so at least some likes are counting...still can't tell if the ones I give are registering though.
I believe the like should be registered if you see the heart icon turn pink, because there have been instances where I've liked someone's HA on the forums and wasn't sure if it went through, so I went to their profile and clicked if they had a "like my HA" link on there and it gave the message that I had already liked their avatar for the day.
So I think the likes still count, it seems to mainly be a visual issue with it not displaying correctly on the forums after you've already liked someone's HA. And I have also noticed my own count going up from time to time, so yeah at least some/most of the likes are still counting on the backend.
Feel free to repost this on this thread: ! Avatar likes not working properly :)