[Bug]: Upgrade to Playwright 1.44 Causes Incomplete multipart/form-data Request Body about playwright HOT 2 OPEN

You have two snippets, one of them uses web platform's fetch and FormData, it should not be affected by playwright, it might be a change caused by newer browser version. As far as I understand, the second example works fine when you say multipart: formData which is expected usage. Can you provide full reproduction example where the form data is not sent properly?

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I apologize for any confusion. I provided two code snippets because we're dealing with two different types of file upload tests. The first one generates a file and sends it directly to the server programmatically using window.fetch. The second one uses page.setInputFiles to add the file to the Angular UI, which then sends the file to the server. Both of these methods generate a multipart: formData request. However, if I upgrade the Playwright version to 1.44, both tests fail as previously described. I managed to find a workaround for the first method using context.request.post. However, the second method still fails. I couldn't find a workaround for this because the file upload is entirely handled by the browser/Playwright.

I can confirm that if I use the same browser version in the same environment with Playwright 1.43.1, the tests pass. However, if I upgrade the Playwright version to 1.44, the tests fail due to an incomplete request body, as previously described.

After some investigation, we found that the cause of the issue is that the new version of playwright is somehow incompatible with our opentelemetry tracer setup.

I created a minimal reproduction environment, please find it attached. Please also find additional information in the README.md
Playwright-bug.zip

NOTE: The provided test will also fail with Playwright version 1.43.1 because the tracer isn't set up properly, but the file will be sent to the server successfully.

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