This is going to reignite the old stalling debate again..
If you use a low RPM and cold start with some beans on a fine setting it then it will stop and not restart until you reset it (which defaults to a higher RPM) and use a coarser setting.
Whether it’s technically a stall or a “failsafe” doesn’t really matter to most users, it just sounds like a PITA.
Also the dial marker (which also secures the dial and stationary burr) looks like it’s easily moved as demonstrated in the video a couple of times, but wasn’t mentioned.
Like with other DFs it looks like it has it’s quirks and odd design decisions, and it was definitely pushed out quickly at the expense of some more R&D.