Either the hitboxes for all the GUI buttons or the mouse are off to the far bottom right of the actual button while in fullscreen mode. In windowed mode, the game will start in the bottom right corner of the screen instead of the center of the screen, which I suspect is related to the issue.
Oddly enough, if I go into windowed fullscreen, the game reports being at a resolution slightly higher than 1080p and not anywhere near the full 4k resolution.
I'm guessing this is either a Windows or Nvidia scaling issue, but for whatever reason, the issue only exists in Minecraft and not any other game.
Edit: So I managed to fix the previous issue by updating drivers (no idea what the actual problem was), but now I have a new issue. The game only shows 1/4th of the screen when in fullscreen. It's as if the game thinks it's running on a 1080p monitor but rendering in 4k. I'm currently in the latest snapshot (15w49b), although the issue persists with any version of Minecraft.
(Sorry for taking a picture of the screen, the issue doesn't show up in screenshots)
Has anyone ever had this issue or know of any possible fixes?
Old Info:
Either the hitboxes for all the GUI buttons or the mouse are off to the far bottom right of the actual button while in fullscreen mode. In windowed mode, the game will start in the bottom right corner of the screen instead of the center of the screen, which I suspect is related to the issue.
Oddly enough, if I go into windowed fullscreen, the game reports being at a resolution slightly higher than 1080p and not anywhere near the full 4k resolution.
I'm guessing this is either a Windows or Nvidia scaling issue, but for whatever reason, the issue only exists in Minecraft and not any other game.
Edit: So I managed to fix the previous issue by updating drivers (no idea what the actual problem was), but now I have a new issue. The game only shows 1/4th of the screen when in fullscreen. It's as if the game thinks it's running on a 1080p monitor but rendering in 4k. I'm currently in the latest snapshot (15w49b), although the issue persists with any version of Minecraft.

(Sorry for taking a picture of the screen, the issue doesn't show up in screenshots)
Has anyone ever had this issue or know of any possible fixes?
Do you have desktop scaling turned on?