Day 2 login reward not appearing

I haven't received my second daily login reward, despite logging in several times to check. No message has appeared in my inbox, nor do I have the 15-min booster in my booster panel. I received the Tankful tag just fine, and the new twitch drops are coming through okay, but my day 2 reward just doesn't want to show up.

I'm on Steam with accounts linked and have had no issues otherwise, unlike some people have experienced.