XPS 15 9550- Random hibernate in active usage

A while ago my laptop started randomly going into hibernate while I was playing games like Overwatch, but when doing other tasks or playing other games, it ran just fine. My screen goes black, and I still hear the game and Discord, then the fans stop and the PC shuts down completely (power button doesn't pulse like it usually does when you set it to sleep), then I boot it back up, the dell logo shows, and the apps I was running are still open like nothing happened.

Previously I had issues with the pc shutting down due to CPU throttling and possibly some thermal issues, but they hadn't happened in about 3 months or longer. And when it hibernates randomly, the temps are below 85C.

I reinstalled Windows and updated all of my drivers through Support Assist, Dell's website and Nvidia GeForce Experience to see if the problem was caused by a driver issue, and the problem persists.

The weird part is, sleep mode is disabled in my power settings (and in the power plan).

The event logs show Kernel Power- Computer entering sleep, reason: Application API. Occasionally before this event there is a DCOM error, but not always.

I considered that maybe it's from having too many things plugged into the USB ports and overcharging the battery (my PC is always plugged into power when I play), but now I only have a mouse and a keyboard (only the mouse has fancy LEDs), and it still happens. Also worth mentioning the diagnostics on SupportAssist show that the battery might need replacement but the laptop is only 2 years old?

I bought a powered USB hub to test if the ports were drawing too much power, plugged my devices on the hub and this didn't solve the problem. 

I'm in desperate need of help, because this not only affects my gaming experience but I'm also an animation student and don't know if I'll be able to work on digital animation projects if the computer can't even deal with Overwatch at the lowest setting...

I have an NVidia GTX 960m 2GB and Intel Core i7.

Here is my event viewer: