AFAIK they did have some issues on the first of their 3rd gen printers, and only for 110VAC models, 230VAC models were unaffected. And they recognized the issue when it was discovered, fixed it, and shipped replacement parts for affected customers.

The current printers you can buy from them are their 4th gen, haven’t heard anything like that for these. They’re technically open source, but they make their own weird forked klipper version instead of just using vanilla klipper.