Second machine with this issue
TL;DR is that our machine started making this terrible grinding noise a while back. I watched all the troubleshooting videos, dis- and re-assembled the parts repeatedly. Nothing stuck or loose. Sent it in for repair as it’s under warranty. Breville fixed and actually lost our machine on transit back, so they replaced it. Now it’s happening again. I’ve read that it has to do with beans? To me that doesn’t make sense. Anyone know why this might be happening AGAIN?