Windows 10: What is it that makes my laptop go to sleep?

My laptop has this annoying "feature" where randomly, after getting up from sleep, goes to sleep after 1.5 minutes of inactivity. After you start sleeping in 1.5 minutes, keep doing it after you wake up until you close everything and restart it.

I have been dealing with this problem for a year, and it is very annoying to have to activate my laptop and write my password after getting away for only 2 minutes. Is there any way to find out what is causing my laptop to go to sleep like this?

I have already checked, my power settings are not missing. I brought my laptop to Best Buy Geek Squad and updated the drivers and firmware, but the problem persists. I have run out of options and can not buy a new laptop at this time.

My laptop is Lenovo YOGA 900-13ISK, with Windows 10 Home Version 1803 OS Build 17134.407