(Double posted, so reply to your list)

To anyone with Raspberry Pi Zero 2W...

I just got Zero 2W + mini HDMI adapter + micro USB OTG cable combo, from Amazon last week. All seem to be working. Except, whenever I plug or unplug OTG cable, the Zero 2W reboots. Nothing is connected to the USB cable, so it's not "power" issue. I don't know if the problem is Zero 2W side or USB cable side.

Does your Zero 2W reboot, when you plug/unplug OTG cable?
It's strange that plugging/unplugging just USB cable, would cause a reboot.