As the title says, I have been experiencing a very awkward frame stutter in certain biomes of the map. I will have a solid 60 frames for 1 frame and the next frame will be roughly half or less. This happens on an oscillating behavior and the pattern is like so: 60-30-60-30-60. I have noticed that this seems to be happening in the desert biome and when water is visible. Take a look at the screenshot below and you will see the FPS graph showing the oscillating frames.
For reference I am playing on Fastest settings with everything in the F2 menu disabled except for Color.