2023 M2 MBP 16" will not restart successfully in clamshell mode

Grant, I just want to follow up with you and let you know about my visit to the Genius Bar. The technician ran his set of diagnostics and found no errors, then we configured the MBP with a number of different monitors using an Apple AV adapter, so all the monitors were getting HDMI signals. There wasn't an Apple monitor in the bunch we tested in the shop. We couldn't make it fail..., the computer and monitors came to life with every restart, as it does when I take to MBP to my office and use the same dock set-up with a Dell monitor. I'm starting to suspect an incompatibility between the Thunderbolt 2 monitor and the M2 MBP. The Thunderbolt 3 monitor doesn't have an HDMI input, so I can't test that directly.

Thanks again for walking me through the diagnostics. I'm grateful for your help.

-SS-

Thanks, Grant. Because I'm new to the M-series Macs, and I migrated to this one straight up to the installed Ventura from a Mojave workhorse, I have daily rotating backups of the machine until I'm comfortable with all that is new since Mojave. That's advice I gratefully accept.

I guess the next step is to run this by Apple Tech Support and see if there's a way to narrow down the buss error to a particular external device. The monitor is an Apple Tbolt monitor with an Apple T2 to t3 adapter. The non Apple equipment is the OWC Tbolt3 dock to which the only major piece of hardware attached is an OWC Thunderbay 6, populated with WD and Toshiba Enterprise drives.

I'll start swapping ports and devices and see if there's a magic configuration that works.

Thanks for your help, Grant. I appreciate it very much.

-SS-

Thanks, Grant, that's certainly what it looks like, except that is starts up perfectly from a shutdown when it's not all lashed up to the dock and the monitor; and when it is lashed up and I go open the cover and enter my login pw, it boots normally. There seems to be something different about the 'restart' routine that's different from a cold reboot, besides the obvious. I'd appreciate any more thoughts...

-SS-

Grant, the entire report exceeded the allowed 250000 character count, so I grabbed as much of the text as I could up through what appeared to be a section break. It's in the additional text section. Is this helpful?

-SS-

Last morsel... when the MPB finally restarts, I get a "your computer shut down because of a problem" and a detailed crash report to submit to Apple, which I do each time.

Thanks, again...

Thanks, Grant. Getting on the phone now.

-SS-