Keeping track of all the bugs I've found:

1. You could use a hashtag multiple times in a post and it would count them separately. This would allow you to get onto the popular hashtags list with one post (FIXED)
2. You can follow yourself using an API bug
3. Not really a bug, but you can do some weird stuff with emojis in display names, such as adding "⚙ 📌"
4. You can block yourself (and you can't see any of your own posts) #imadeanaccount
5. Notifications page icons showed as black even in dark mode (FIXED)
6. User's following page says "profike's following" instead of "{username}'s following". Profike appears to be a misspelling of profile