Header not being saved in POST request

Hello! I am having an issue where the POST request I am making won't save in the request. I will provide some screenshots below. I'm not sure if I am doing something wrong or if this is a bug?

I confirm that Content-Length is not being sent

Hey you two!

After checking with our devs it looks as though this header is recalculated by the libraries we use to make requests. For some further context here, how are you looking to use the content-length header when setting it manually?


Within the API call I am required to set the Content-Length to a specific value.

How might that differ from the value that is automatically generated? I'm wondering if there's an intermediate workaround here that you might be able to use.

If you happen to have docs for the API you're using it might be helpful to post those for us to look at as well!