[BUG] 1.20 has broken our tests in WebKit (page is just blank)

• Playwright Version: 1.20
• Operating System: Windows
• Node.js version: 16.3
• Browser: WebKit
• Extra: Since upgrading to 1.20 none of our tests work on WebKit anymore, downgrading the package works.

I have an example of the test here https://try.playwright.tech/?l=javascript&s=k7pbmkr

const playwright = require('playwright');

(async () => {
  // Try to add 'firefox' to the list ↓
  for (const browserType of ['chromium', 'webkit']) {
    /** @type {import('playwright').Browser} */
    const browser = await playwright[browserType].launch();
    const context = await browser.newContext();
    const page = await context.newPage();
    await page.goto('https://console.cloudmanagementtest.apteco.com/authentication/login', {
      waitUntil: "networkidle"
    });
    await page.screenshot({ path: `example-${browserType}.png` });
    await browser.close();
  }
})();

try.playwright.tech is currently on 1.19 and it works correctly, I can also confirm that it works correctly when I downgrade my package back to 1.19. However 1.20 doesn’t load any content on the page.

[jnizet]

@pavelfeldman sorry, I meant to comment on #12821, which is the issue I’m facing. I deleted my comment here and added it on #12821.

[pavelfeldman]

Fix coming up in 1.21 shortly.