For the most part the game runs perfectly at 60fps, occasional drops to 50-55fps. However in extremely specific locations (and generally only when looking downward at trees) I get sudden drops to an exact 30fps- The game continues running at 30fps until I look up at the sky, in which it returns to regular 55-60FPS. If i don't look at the sky, the game will continue running at 30fps indefinitely.
AMD Radeon software does not register Minecraft in my games list. Radeon overlay will not work in game.
Monitor is configured to 60 hertz. Vsync is turned on. Playing full screen.
Using SEUS shaders on Optifine 1.16.3
Performance mode on in windows 10
*IF I TURN OFF VYSNC I DO NOT GET 30FPS LOCKS AND DROPS, HOWEVER I GET EXTREME STUTTERING AND SCREEN TEAR AT 80-120FPS*
These are very odd circumstances, any assistance would be greatly appreciated.