Hi, I believe I have some useful insight into what's causing this serious issue for so many users. In a nutshell, I believe the engineers failed to adequately test the power management features of the M1 devices with external devices when plugged into the AC power....as so many of us are doing working from home during the pandemic.
After returning a defective refurbished MacBook with the Intel chip to Apple, I decided to go for it this April and buy a brand new M1 Air from Costco. I experienced the same VERY frustrating random reboot issue with the replacement MacBook Air M1 they sent me last week which further confirmed my theory.
As we've all seen, this is now a well-known reoccurring, intermittent issue with both the MacMini and Macbooks with the M1 chip when using one external monitor and/or hub. Still, six months later, Apple doesn’t seem to be addressing it in a timely manner. This issue occurs even with the Apple brand adaptor they sent me. I can't express how frustrating it is having these brand new devices crash on me with so few apps open right before a business meeting or on deadline for major project....ironically for the tech industry clients sometimes. Ugh!! I definitely feel everyone's frustrations whether depending upon these M1s for work or play....especially during COVID.
So here's my ureka moment in trying to get to the bottom of this. Since observing that the issue doesn't seem to be tied to specific apps or brands, I realized it must deal with the power managment of this first-gen chip. I noticed that if I unplug the power cord the problem won’t occur. This suggests Apple failed to test the power management of the new chip enough when using peripheral devices….as most users are during the pandemic at home especially. It seems 'kernal panic’ events will occur as a result of the power mismanagement.
I feel that Costco and other retailers should demand that this apparent hardware issue be addressed before selling another M1 devicce. Read the user comments on the most reliable media reports online and you'll see the random rebooting is unlikely due to third-party apps causing this as Apple has asserted. This issue occurs even using just Apple Mail, Safari, etc.
I hope Costco management will take my message seriously and urge Apple to act swiftly and appropriately with your members. We depend on Apple computers for our livelihoods, not just for fun. Also, if Apple is aware of certain fixes, I feel they are obligated to inform the retailers who sold them and also the end users who paid good money for the Mercedes of computers.