Form reloads with prevent_default() in EventHandler from struct

**Problem**

Calling `prevent_default()` inside an `EventHandler` returned by a struct method does not prevent the default form submission (page reload), whereas an inline closure works as expected.

**Steps To Reproduce**

Steps to reproduce the behavior:

- Clone the repository here https://github.com/T00fy/dioxus_form_test and run the app with `dx serve`
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- In **Scenario A (Problematic Form)**, type a value and click **Submit**.
- Observe console logs show `prevent_default()` called, and the page reloads (`/?data_a=…`).
- Async task never finishes due to the page reloading.

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- In **Scenario B (Working Form)**, type a value and click **Submit**.
- Observe no reload and the form’s status updates in-place.
- Async task completes properly.

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- In **Scenario C (Debug Form)**, repeat and note that despite an immediate `prevent_default()`, the page still reloads.
- Async task never finishes due to the page reloading.

**Expected behavior**

Including `prevent_default()` should not cause a page to reload. I'm also not sure why the async task never executes when the page reloads.

**Minimum reproducible example**
See here: https://github.com/T00fy/dioxus_form_test

**Environment:**

- Dioxus version: v0.6.3
- Rust version: rustc 1.87.0 (17067e9ac 2025-05-09)
- OS info: Fedora
- App platform: web