The last few days, for some reason, I've been randomly getting locked to 30fps without any apparent reasons. I've checked the ingame options, and my GPU's as well, and everything seems to be as it should.

It can happen at any time, from boot to after a couple of hours if not more, so I have no idea what it could be that's causing this, specially considering that I normally have around 70-80fps.

My graphics card's drivers and software were updated a couple of days ago, which I thought was the reason behind it, but I uninstalled it, and installed an older version instead, and I still am having problems with it, so I don't know what else to do.
The things I've tried are:

Fresh PC boot to the game
closing all browser windows
overclocking my GPU
playing using Full Screen, Windowed and borderless

Running Windows 10 and a Radeon RX580

but now that I think about it, having seen and heard about how many people had trouble with the latest windows update, could it had been that, that is causing it?