Bambu Lab is officially recalling all A1 3D printers (not counting the A1 Mini). The company “strongly” urges owners to stop using it for safety reasons after it was alerted to “unstable temperature readings” that it first traced to a faulty heatbed cable last week. After further investigation, Bambu says “less than 0.1% of all the A1 printers sold” are affected by the problem, but it can’t say with 100 percent certainty what the cause is, so it’s offering a full refund to…