It happens to me once in a blue moon. Enough that I know the folks complaining aren't making things up, but yet something is different between their setup and my own.

It usually takes me a few minutes to notice. I'll see a tweet that I recognize from a previous session, or from someone I don't follow, or something like that.

I have it reset just about every day.

Perhaps I'm on the wrong end of Twitter's A/B testing.

It used to happen every ~5 days, it did for at least a year. It hasn't reset for me for months though, I guess they stopped doing that.

It's reset on me 6 times across two accounts. I know because I complained ... on Twitter