Lossless scalling cuts down my FPS in half and then doubles it

[Bullitt]

For the first days I used lossless scalling everything was fine. but after a while it started doing this.

I have no idea why that's happening and this basically makes it unusable. I'm aware it needs some overhead, but not this much

[Gizzmoe]

Have you tried a reboot? If that doesn't help then explain the problem in more detail and post your system specs, including monitor resolution and refreshrate, game resolution and what numbers the LS framerate counter shows in-game