Troubleshooting Reading Position Syncing (iOS and macOS)
My timeline position isn't getting synced - why?
There are a couple reasons why your timeline position might not get synced:
If Twitterrific has trouble communicating with iCloud or the Twitter server it will be unable to save your timeline position.
If there are too many new tweets when you refresh, then the tweet at your saved position may be too old to show up in your timeline.
Make sure iCloud Drive is enabled on each device you wish to use. On iOS devices, also verify that iCloud is allowed for Twitterrific in addition to enabling iCloud Drive.