Waypoints deleted on game restart - file overwritten with empty data

[korboybeats]

Describe the bug

Waypoints are deleted when closing the game using the X button (top right title bar) while connected to a server. The waypoints NBT file gets overwritten with empty data on next launch.

Findings:

• If you disconnect from server → Quit Game button in menu → waypoints are retained on next launch ✅
• If you close the game using the X button (top right title bar) while on a server → waypoints are gone on next launch ❌

When waypoints are lost, the waypoints NBT file gets overwritten from ~351 bytes to 21 bytes (just the waypoints header with no data) on the next startup.

The waypoint location coordinates also appear to be stored as all zeros in the NBT data, which may be related.

Steps to reproduce

1. Join a server
2. Create a waypoint
3. Close Minecraft using the X button (top right title bar) — do NOT use the in-game Quit Game button
4. Reopen Minecraft
5. Waypoints are gone — file has been overwritten to 21 bytes

Workaround: Disconnect from server first, then use the in-game Quit Game button.

Meteor Version

Build #80

Minecraft Version

1.21.11

Operating System

Windows 11

Before submitting a bug report

• This bug wasn't already reported.
• This is a valid bug.

[Big-Iron-Cheems]

Interesting find, although I have to ask why one would ever close the game that way instead of exiting via the main menu as intended.

[crosby-moe]

unfortunately, the X is less of a “close” and more of a “kill”, meaning it bypasses the shutdown hooks we use for saving data

not too sure what can be done about this short of automatically saving the data on some timer while the game is running

[korboybeats]

Interesting find, although I have to ask why one would ever close the game that way instead of exiting via the main menu as intended.

faster to just quickly click the top right exit button instead of having to click Disconnect -> Back -> wait for "Quit Game" button to appear.

[korboybeats]

its weird because I can create a waypoint and exit properly and it'll save but then if I launch the game again and use the top right X button, the way point still gets removed