[Bug]: The request payload does not parse format in UI mode

[DaoThinh96]

Version

1.49.1

Steps to reproduce

Hi everyone, I found an issue: the request payload does not parse to JSON format when I run Playwright's UI mode. Please take a look the screenshot below:

• Playwright UI mode:

• I also check it in my local Chrome but it is working fine:
  

Please help me check whether it is the real issue or not. Thanks

Expected behavior

It should not throw the error 400 code

Actual behavior

It is throwing error 400 code

Additional context

No response

Environment

System:
    OS: macOS 15.1
    CPU: (8) arm64 Apple M1
    Memory: 90.34 MB / 8.00 GB
  Binaries:
    Node: 20.11.1 - /usr/local/bin/node
    Yarn: 1.22.22 - /usr/local/bin/yarn
    npm: 10.2.4 - /usr/local/bin/npm
  Languages:
    Bash: 3.2.57 - /bin/bash
  npmPackages:
    @playwright/test: ^1.49.1 => 1.49.1

[Skn0tt]

Both screenshot you share look like DevTools to me, not UI mode. Also, it looks like request payload is in URL query format, not JSON.

Could you try rephrasing what problem you're looking at?