Crash When Exiting from Minecraft.

Summary
When exiting from the menu using the ESC key, the Minecraft app crashes.

Steps to Reproduce:

1. Open your Minecraft Windows 10 Edition from your PC.
2. Wait until Minecraft opens.
3. Press Esc button.
4. A panel shows up, then press OK.
5. Game crashes - error entry in Event Viewer

What I expected to happen was...:
Game exits gracefully.

What actually happened was...:
The game crashes rather than exiting gracefully, causing a hang on a white screen for some setups.

Notes

• Doesn't appear to affect any in-world exit methods.
• Is not present in 1.16.0.60