LRA's are created by sending an HTTP POST request to the coordinator. POST requests that create new resources normally return the newly created resource in the Location header [1] or based on the "effective request URI" [2].

The coordinator implementation does not set the Location header.

[1] https://tools.ietf.org/html/rfc7231#section-6.3.2
[2] https://tools.ietf.org/html/rfc7230#section-5.5