Turning off hibernation?

The Hi10 Air appears to be configured to go into hibernation (suspend-to-disk) after having been suspended a certain time, but I’ve never been able to get back into the suspended session. In fact, I can only get the tablet to turn back on by keeping the powerbutton pressed for a very long time which evidently causes a hard reboot.

The same thing happens when I boot it under a different OS from an external drive (Linux or ChromeOS), so I am pretty certain that this is a firmware feature.

This is a real PITA because it means I have to turn off the tablet every time (I simply don’t trust its suspension anymore).
Can one turn the hibernation off or postpone it for more than 24h somewhere in the BIOS settings?