Wrong host header, on incoming requests from Roku/DVP
We have been serving ads for Roku devices for a long while. We have been getting a constant stream of requests, sometimes more sometimes less, that reach our servers but have a host header of an unmatching domain (example: say our servers domain is "bla.ourserver.com" the host header would state something like "someone.else.com") The requests' user agent is always "Roku/DVP-" though different versions. The domain received on the host header would usually be a 3rd party that had most probably redirected a request to our servers, or a domain that we redirect requests to.
Is there a known issue on "Roku/DVP-" mis-handling host-header on redirects, or any similar known issue that could explain such behaviors? Thank you