I had the same problem with rebooting with my Beryl. The first problem, which was my mistake was that I was using a 2.5A rated USB-C cable and not a 3A. After changing the cable with a 3A, the problem wasn’t as frequently as before, but it was there. To solve the problem, I am using the following:

  • A well-known brand AC adaptor (power/charging brick) like Samsung, Anker, Baseus… that is over 15W (3A minimum, 5V);
  • A well-known brand cable with the minimum 3A rating. I am using a USB-C to USB-C from Baseus;
  • Firmware 3.203