MockRoute() not working for overrides Headers on specific URL

[Horsty80]

What are you trying to achieve?

I try to overrides headers for specific routes.
I know I.haveRequestHeaders() is working but on all routes, i need to overrides only specific routes that match RegExp

// Works on all routes
I.haveRequestHeaders({ 'X-Custom-Header': 'My-custom-Value' }); 

// Doesn't works 
I.mockRoute(/\/api\//i, async (route: Route) => {
  const existingHeaders = await route.request().allHeaders();
  const headers = {
    ...existingHeaders,
    'X-Custom-Header': 'My-custom-Value',
  };
  route.continue({ headers });
});
// Headers are not modified

Details

• CodeceptJS version: "codeceptjs": "^3.3.0",
• NodeJS Version: v16.9.1
• Playwright: "playwright": "^1.20.2"

[Horsty80]

See on issue in Playwright repository. microsoft/playwright#13527

Everything is working normally, it's just the how that i use to check it's working that is not correct.