[BUG] A specific test not running on Docker (mobile safari)

Context:

• Playwright Version: 1.19.2
• Operating System: Mac
• Node.js version: 12.22
• Browser: Mobile Safari [iPhone 12]
• Extra: Docker image PW v1.19.2

Code Snippet

Help us help you! Put down a short code snippet that illustrates your bug and that we can run and debug locally. For example:

// foo.spec.js
test('test', async ({ page }) => {
    await page.goto(<MY_URL>);
});

// config.js
projects: [
 {
    name: 'Mobile Safari',
    use: devices['iPhone 12'],
 },
],

Describe the bug The above test is passing locally when I run it using npx playwright test. Ran it 100 times and it worked 100 times. The test is simple which is navigating to an URL and waiting for the load event.

Running the same test on Playwright focal image 1.19.2, it fails. The logs:

Timeout of 30000ms exceeded.
....
    page.goto: Navigation failed because page was closed!
    =========================== logs ===========================
    navigating to "<MY_URL>", waiting until "load"

The same tests runs fine locally and on docker using projects like “Desktop Chrome”, “Desktop Safari”, and “Mobile Chrome” (Pixel 5)

Note: Shared MY_URL with @pavelfeldman privately

[nhe23]

After some investigation I found out that Mobile Safari tests are working inside the Docker container but they are much more likely to timeout and fail compared to for example Mobile Chrome tests. This paired with the not so great performance of AzurePipelines lead to all Mobile Safari tests failing inside the pipeline.

[pavelfeldman]

Closing as per above