Terrain additions causes server bootup timeouts

After creating a new island of terrain with the Roblox terrain editing tools, published builds of our place no longer work. The issue started immediately after the new terrain was painted.

  • Server bootup takes roughly 3–4 minutes, then fails. Server scripts take so long to load that they eventually time out.
  • Entering the published build and publishing the place each take a few minutes longer than before.
  • The new island is about 7,000 studs wide and adds about 20 MB to the place file.
  • StreamingEnabled is enabled.
  • Removing the new terrain entirely, or rolling back to a version before the terrain additions, fixes the issue.

Steps to reproduce:

  1. Open the terrain problematic file.
  2. Publish the place
  3. Start a server in the published experience (Roblox Player).
  4. Observe the publish taking a few minutes longer, and the server taking 3–4 minutes to boot before server scripts time out and the build fails.

Direct Links: The issue reproduces when the same place file is published over other experiences. Link to the affected experience is in the staff-only section.

Related posts:

System Information:

Device: MacBook Pro, Apple M5 Max
Roblox Studio: Version 0.741.19.7411056 (arm64)
Reproduction Files: See private content

Expected behavior

The place publishes and servers boot normally after adding the new terrain, and entering the published build is playable.

A private message is associated with this bug report