ok this has to be a bug in `workerd`

try {
    const controller = new AbortController();
    const timeout = setTimeout(() => controller.abort(), 1);
    await fetch("https://example.com", {
    signal: controller.signal
  }
} catch {}

try {
  fetch("https://example.com", {
      signal: AbortSignal.timeout(1)
    }
} catch {}