[🐞] v1&v2: tracking optional property default-initialized by function call does not re-run task

[FloezeTv]

Which component is affected?

Qwik Runtime

Describe the bug

When a component's optional prop is assigned the result of a function call as a default value and the property changes, a task tracking that property is not rerun, even though the property changed.
Initializing the prop to a constant works as expected and reruns the task.

Example

The example-code below creates two components where the only difference is how the optional prop value is initialized to a constant in ComponentA and to the result of a function-call in ComponentB:

const getValue = (): number => 0;

const ComponentA = component$(({ value = 0 }: { value?: number }) => {
  useTask$(({ track }) =>
    console.log(
      "Component A task value:",
      track(() => value),
    ),
  );
  console.log("Component A value:", value);
  return <div>Component A value: {value}</div>;
});

const ComponentB = component$(({ value = getValue() }: { value?: number }) => {
  useTask$(({ track }) =>
    console.log(
      "Component B task value:",
      track(() => value),
    ),
  );
  console.log("Component B value:", value);
  return <div>Component B value: {value}</div>;
});

export default component$(() => {
  const num = useSignal(0);
  return (
    <>
      <button onClick$={() => num.value++}>Click me</button>
      <ComponentA value={num.value} />
      <ComponentB value={num.value} />
    </>
  );
});

With these components, clicking the button produces the following console-log:

Component A task value: 1
Component B value: 1
Component A value: 1
Component A task value: 2
Component A value: 2
Component B value: 2
Component A task value: 3
Component A value: 3
Component B value: 3

ComponentA's task is correctly re-run when the value changes, while ComponentB's task is never re-run.
The value of the property is changing as indicated by the Component B value: <>-logs and the text updating in the browser.
Both tasks are executed once on the server:

Component A task value: 0
Component A value: 0
Component B task value: 0
Component B value: 0

Reproduction

v1: https://github.com/FloezeTv/qwik-default-props-task-rerun/tree/v1 v2: https://github.com/FloezeTv/qwik-default-props-task-rerun/tree/v2

Steps to reproduce

• Create a new project (v1 or v2) (npm create qwik / npm create qwik@2.0.0-beta.32)
• Create a component like ComponentB from the example, where an optional prop is assigned a default value from a function call and then tracked in a task
• Update the component's prop and check if the task is executed

System Info

System:
    OS: Linux 6.12 Manjaro Linux
    CPU: (16) x64 AMD Ryzen 7 5700U with Radeon Graphics
    Memory: 9.19 GB / 38.58 GB
    Container: Yes
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 25.8.1 - /usr/bin/node
    npm: 11.11.1 - /usr/bin/npm
    pnpm: 10.32.1 - /usr/bin/pnpm
    bun: 1.3.11 - /usr/bin/bun
    Deno: 2.7.5 - /usr/bin/deno
  Browsers:
    Firefox: 150.0
    Firefox Developer Edition: 150.0
  npmPackages:
    @qwik.dev/core: ^2.0.0-beta.32 => 2.0.0-beta.32 
    @qwik.dev/router: ^2.0.0-beta.32 => 2.0.0-beta.32 
    typescript: 5.9.3 => 5.9.3 
    vite: 7.3.1 => 7.3.1

Additional Information

No response

[wmertens]

Seems ok in V2?

https://qwikdev-build-v2.qwik-8nx.pages.dev/playground/#f=7VfBDsIgDP2VxZNmi5kePCxRs%2F2LJ%2BPJ48K%2FW1oooFC24Q4mvosuQFvaVx54pDkeTlHWNKyS%2BI%2BEWKQS7RnOElIHve%2FOygHsv%2BUpfA73MMln3KjbC5e2leogHPy8shXFiWQFhzWkxzhmtu1fATgzGhsnAT0o3fNOHrpNE0wjoF3TBjhtF5ulkRzAfKeGwjiD0GxUxq9kw7Wnvql9GqlG%2FFV0k5Mt6XYWJ7zVb0jWz7IAsicXUoJc5FycUQJI8CowZMkhYTpxJCxalCGchAQZh3lklBAnqnUwh6gSsiSWMEUOl4KaBzoA%2BoNP1G1bkFCNQFJKwHJUbIieiu6FNFLuYOd7LHFdqwsOVY8bPyy%2F5NyE4EkMujyP7F05eVzHpSH0%2Bi6dqq%2BDQmZKgCb93xt%2F7974Ag

[FloezeTv]

The task in ComponentB is not rerun for me when clicking the button (no Component B task value: <>-messages):

[wmertens]

Ah ok sorry on phone

[Varixo]

Looks like the optimizer problem. Transform is not correct in both cases
https://qwikdev-build-v2.qwik-8nx.pages.dev/playground/#f=7Va7DsIwDPyVqhNVK1SYUBCg5l%2BYEBNjlH%2FHuUscq6IVAwxITG3lR3Lu2WdDmsP%2BJWkGFUm8UYdXmUTIMkooDgm2K2og8Ed10TE8iZMlXEjdhdBdE51cB58XzRK1jirgEkM5hg04rf7nMrR18k8icI8bM7t2yA7IkRkPU0cLHlKy2gNpHbLZmKgJeEauS%2ByLOVq%2FiLbUTM7%2FFmz%2FUdh%2BDfY7E4WlEXyCXtm1Ge2R8x7h%2FlnXrsBskmOLS%2FR9PMPU3K%2B6rZZgQzk4n4LGRdMt5l8tutU26o7%2F0fd7o%2B8J