Semantic token highlighting breaks after restarting LSPs

[feitreim]

Reproduction steps

1. Start zed
2. enable semantic_tokens = "full"
3. include ty as a lsp for python
4. create dummy python file
5. once the highlighting appears, restart the lsp
6. highlighting is gone and wont come back, even if you switch it on and off.

Current vs. Expected behavior

video of it misbehaving:

Screen.Recording.2026-03-12.at.11.34.44.PM.mov

current:
semantic token highlighting doesn't come back after a lsp restart.

expected:
it should come back.

Zed version and system specs

Zed: 0.227.1+stable.199.9f9b707d39d62468d4cdaed2d8eb95a847da4cf9
OS: MacOS 26.3
Memory: 16GB
Arch: aarch64

Attach Zed log file

Relevant Zed settings

settings.json

{
  "languages": {
    "Python": {
      "formatter": { "language_server": { "name": "ruff" } },
      "language_servers": ["ty", "ruff"],
    },
  },
  "semantic_tokens": "full",
}

Relevant Keymap

No response

(for AI issues) Model provider details

No response

If you are using WSL on Windows, what flavor of Linux are you using?

None