I follow several dozen very left wing / progressive accounts on twitter and haven't seen any of them on my timeline for weeks. Examples:

Dan Cohen, Max Blumenthal, Abby Martin, Jimmy Door, Mike Prysner, Aaron Mate, Chris Hedges, Ron Placone, Sarah Abdallah, and the Real News Network, along with several Assange supporters and related accounts.

I had to go and turn on explicit notifications for all of them to start seeing content. It's extremely obvious that this is not just one account getting accidentally flagged.