Jar dimension sometimes doesn't work on initial (usually Superflat) world creation, but works after leaving and rejoining world

[unilock]

Sometimes, creating a jar doesn't work, usually during the first play session of a Superflat world.

Apparent issues:

• Constructing a jar and right-clicking the top with a Jar Cork does nothing in-game, with only [Server thread/ERROR]: Error getting jar dimension! being thrown in the log.
• Running any /jar-it command prints the chat message "No jar dimension???". I can give myself a jar using /jar-it give 1, but placing it infinitely spams the log with [Server thread/ERROR]: Error getting jar dimension! until the jar is broken.

Tests:

• A Normal world created with NO configuration changes, aside from "Game Mode: Creative", works fine.
• A Superflat world created with NO configuration changes, aside from "Game Mode: Creative" and "World Type: Superflat", has the above issues.
• (only tested under singleplayer; multiplayer not tested)

Workaround:

• Leaving and rejoining the Superflat world fixes the bug.

Caveats:

• I once created a Normal world that had this bug. Rejoining it fixed it as well.
• I've created at least one Superflat world that did not have this bug.
• I've since deleted both of those worlds because I'm a bit silly.

Info:

• Launcher: Prism Launcher 5.1
• Minecraft: 1.19.2
• Quilt: 0.18.1-beta.12
• Mods (from Modrinth):
  • Jar It! - 0.1.11+1.19.2
  • Quilt Kotlin Libraries - 0.1.2-MODFEST
  • Quilted Fabric API - 4.0.0-beta.20+0.66.0-1.19.2
• System (hopefully this isn't relevant):
  • MacBook Pro, 16-inch, 2021
  • Chip: Apple M1 Max
  • Memory: 32 GB
  • macOS: Ventura 13.0.1
• java -version - OpenJDK 64-Bit Server VM Zulu17.38+21-CA (build 17.0.5+8-LTS, mixed mode, sharing)
  • (today i learned, java -version and java --version have different outputs! as if this couldn't get any more cursed)