A Finnish tech site got a statement from Asus. You can find it below (translated by Google). Obviously that 5 days repair time it not happening currently.
The company is aware of the problem and is currently monitoring its prevalence on a global scale. At least so far, it has only affected a very small portion of the devices, and the frequency of occurrence may seem higher than it actually is in an active forum discussion for which Asus offers an open Zentalk platform.
According to Asus, the ramdump / debug mode is not the cause of the fault but a consequence, which in turn may be a symptom of many different faults, such as a charging circuit problem, a motherboard fault or some other random fault. In many similar situations, phones from many other manufacturers get stuck on a black screen, boot, or logo scene while Asus phones display this ramdup / debug mode.
All users with a valid warranty and no obvious external damage to the phone are entitled to warranty service for the problem. Asus promises to fix this problem on devices with a maximum service time of 5 days + delivery time. If a problem occurs, it is recommended that the customer contact local Asus Support / Service.
