If the computer has a monitor connected with HDR capabilities, then there is an option in the Windows "Display Settings" screen to "use HDR". Even if an app or game does not support HDR, having the setting enabled will cause the display to be brighter and have higher contrast, so the setting should remain enabled if the user chooses to enable it. While launching Minecraft, the Windows HDR setting becomes disabled, and after quitting the game the user must go back to the Windows "Display Settings" to re-enable it. Launching Minecraft should not disable this setting.

I've tested with other games that do not support HDR and do not experience this issue.

I am able to reproduce in both 1.15.2 and 1.16 Pre-release 2, but I have not tested other versions.

What I expected to happen was...:
The Windows HDR setting should remain on when launching/playing Minecraft.

What actually happened was...:
The Windows HDR setting is disabled upon launching Minecraft.

Steps to Reproduce:
1. Connect your computer to an HDR capable monitor.
2. Enable Windows HDR as described here: https://support.microsoft.com/en-us/help/4040263/windows-10-hdr-advanced-color-settings
3. Launch Minecraft