playwright [BUG] before unload dialog is not closed after accept or dismiss

System info

Playwright Version: [v1.31.2]
Operating System: [macOS 13.2.1]
Browser: [Chromium]
Other info: [Node 16.16.0]

Source code

[x] I provided exact source code that allows reproducing the issue locally.

Test file (self-contained)

const { chromium } = require('playwright');
(async () => {
  const browser = await chromium.launch({
    devtools: true
  });
  const context = await browser.newContext();
  const page = await context.newPage();

  await page.goto('https://example.com');

  page.on('dialog', async dialog => {
    console.log(`Found dialog. Type: ${dialog.type()}, message: ${dialog.message()}`); // get dialog type and message
    // await dialog.dismiss(); // Does not close the dialog and does not navigate
    await dialog.accept(); // Does not close the dialog but allows the navigation
  })

  await page.addScriptTag({ content: 'window.onbeforeunload = (evt) => { evt.preventDefault(); evt.returnValue = ""}' })

  await page.locator('body').click(); // chromium requires a user gesture to enable beforeunload

  await page.evaluate('window.location="https://www.iana.org/domains/reserved"')

  await page.waitForTimeout(3000) // wait to check if the dialog disappears

  await context.close();
  await browser.close();
})();

Steps

[Run the script]

Expected

If the dialog is dismissed, the dialog should close and the navigation should fail and the browser closes If the dialog is accepted, the dialog should close and the navigation should occur and the browser closes

Actual

If the dialog is dismissed, the dialog does NOT close. The navigation does not occur and the browser does NOT close If the dialog is accepted, the dialog does NOT close, although the navigation does occur and the browser does close