Canon supplied a modification to the units. Later they stopped that model and for this application you had to buy a model produced to not shut off.
This never sits well with folk but today the answer is to get a camera that does not shut off.
Help, my PC with Windows 10 won't shut down properly
Since upgrading to Windows 10 my computer won't shut down properly. I use the menu button shutdown and the screen goes blank, but the system does not fully shut down. The only way to get it to shut down is to hold the physical power button down till it shuts down. Any suggestions?