- Analytics.twitter.com numbers changing unexpectedly, being zeroed out temporarily, inconsistent numbers
- Deleting tweets and having them not show up on my timeline but still show up in search weeks later.
- The repeating timeline bug, you're going down the timeline and after a while it loses its place and repeats tweets you saw a couple of minutes ago
- People who have blocked me (gah) but I still see their tweets in certain apps.
tbh I see some strange stuff on Facebook and Reddit sometimes and granted it's hard to do what they do at scale. But Facebook and Google products seem to evolve a lot more over the years.