The Content-Type header should not be sent for GET requests. See here for more info: https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Content-Type
@avirtum Is it possible you are including the Content-Type header in the GET requests? That header typically isn’t necessary for GET methods and could be the reason for the issue. This MDN reference might be helpful for clarification: Content-Type – HTTP | MDN.