I came out to find this. WTH, is there a diesel motor in the thing. App showed nothing wrong. I moved it back and forth with my hands and it just kept idling along.
What’s going on under mower deck?
Where do I check the oil???
This is a brand new core only a month ish old.
It was the core doing it, I think? It was on the charger charging at about 80%.
Yup, just checked, not the deck, you can see the core shaking.
Wow! I’m completely at a loss. Are the track motors jumping like that? The only other mechanical device I can think of in there is the lift actuator.
Could be the track encoder is having an issue. Have you tried the usual cold boot procedures? Can you push the core somewhat easily when it’s powered off? If the tracks move somewhat easily when there’s no power, then it’s probably a software or encoder issue.
I pulled the battery and it stopped. I don’t think it was the drive motors as I manually rolled it back and forth and it did not change anything.
Mechanically, there aint much more in these things. Maybe it’s the new vibrate notification feature that’s supposed to go to your phone. 
Ah, it’s almost ready for prime time. It definitely got my attention!
So you heard that knock too?
I’m leaning towards a blown head gasket 
Don’t forget to keep your DEF fluid topped off…
Speaker running a bass check? 
Now I know why they needed 6 screws to hold it on! 
This amazes me that I am the only one on here that had this happen to them.
On the upside, this should also help dislodge any grass building under the mower. Can you schedule it to do this before it docks each time?
I’m often the winner of this prize. It’s someone else’s turn
@mike1 can you look into this? 