REPRODUCIBILITY: every time
OS VERSION: 4.5
HARDWARE: Sony Xperia 10 iii, USB-C to HDMI cable or USB-C with HDMI output
UI LANGUAGE: US english
REGRESSION:
DESCRIPTION:
Whenever I connect the cable the phone instantly reboots
PRECONDITIONS:
STEPS TO REPRODUCE:
Connect an external display cable to the phone
EXPECTED RESULT: Maybe video output would work. Then I could use Visual Studio Code on the phone and not have to carry my computer on long trips.
ACTUAL RESULT: a reboot
MODIFICATIONS:
ADDITIONAL INFORMATION: I tried a USB-C to HDMI cable and 3 different USB-C hubs
Can confirm this behavior. I tried this with an older SFOS version a few months ago using a Xperia 10 and some USB-C to HDMI adapter, having the same result as you had.