Earlier quoted context omitted.
A few weeks ago their mandatory cloud printing service had a bug and caused printers to spontaneously crash in the middle of the night, in many cases doing significant damage to the printer. Other than that Bambu had a pretty good reputation.
I hadn't heard of this company or that story but it was wild https://www.reddit.com/r/3Dprinting/comments/15sfisq/bambula...
They call it a "bug", and the explanation seems plausible, but consider that a hacker could easily do the same thing.
Good thing these are only hobbyist-level machines, and AFAIK not used in any real production manufacturing. Imagine the same sort of bug (or hack) happening to CNC machines all over the world.