I have two identical Montitors. One of my monitors is mounted upside-down. While Minecraft in windowed mode shows rotated correctly as this is managed by windows, switching to fullscreen makes the window be upside-down while the cursor is still correctly mapped to the window. (A button that is shown in the top right, needs to be clicked in the bottom left). In my opinion Minecraft should take the same screen rotation as windows has set.

The bug requires following states to be reproduced.

• Two Completely Identical Monitors
• The Secondary Monitor Is Flipped
• Minecraft is set to full-screen in video settings on the secondary flipped monitor

The bug has been replicated on multiple PCs.