Should counter with the USA using the imperial system.

OK I ask as I had an issue which was very similar to what your experiencing, eg. Not always turning off or sleeping instead etc.

I found a solution for me and it was by altering the nvidia-sleep.sh file. From memory I had to insert an _exit 0 () at the top. After doing this never had an issue until nvidia did a driver update.

usr/bin/nvidia-sleep.sh needs to still be deactivated by an immediate exit. Add a line just after the bash header line to cause immediate exit 0 (ie success) from the script:

#!/bin/bash exit 0

This is a link I found. Down around half way.

https://askubuntu.com/questions/1345073/suspend-not-working-properly-cannot-wake-up-on-ubuntu-20-04-with-nvidia

Do you have an Nvidia GPU installed?

It’s weird because Starlink hasn’t been around that long that we should have become reliant on it yet.