I will try to figure out what can be happening with the jumping posts. I am not sure what can trigger that. The only code that makes that jump is a click on the home tab twice.

But yeah, Amethyst also downloads 50MB or so on every cold start (all your posts, all your DMs, all your notifications, etc). So, it's a 50MB over Tor issue. I need to reduce that amount and spread it better over the loading time.