According to the official documentation of the httpRequest Pipeline step, the parameter timeout defaults to 0, meaning no timeout.
However, starting from version 1.22 of the HTTP Request Plugin, the default behavior appears to have changed.
When the timeout parameter is not provided, the request now fails after approximately 5 minutes, indicating that a default timeout is being applied.

This behavior contradicts the documented default behavior and appears to be a regression introduced in v1.22.