The mouse disappears or doesn't disappear when entering and exiting full screen mode.

The mouse doesn't appear in the inventory or settings, or doesn't disappear when I go back to the game. I expected that the mouse would appear when I opened the inventory to sort it. Instead, my mouse seemed to be invisible. I thought it was a feature at first and went to settings to fix it, only to find it was still invisible. This only happened in full screen and when I exited full screen, the mouse appeared and disappeared as normal.

To reproduce:

1. Open Launcher
2. Open installation of Minecraft.
3. Enter full screen mode.
4. Do some gameplay
5. Open inventory.