TAAU Upscale Mode Problems

Just by playing with the TAAU Upscale Mode on the Vibrant Visuals is the enough to cause this problem to me, the game is simply inconsistent with its framerate, freezing and unfreezing the screen for each movement that I make, even if I put it on the lowest settings. The expected results would be the game running normally, but instead it keeps on this endless cycle, being The End the place with less problems, running almost normally. It's like the TAAU doesn't run properly on low-end devices, besides it is the most playable