Eversince my Roku Device received the 9.4 update i have had issues with the Dolby digital surround track.
I now have 5.1 surround working perfectly on Google Play and Apple Tv .
but the only way to receive it on Disney+ and Now Tv is to select back through the HDMI inputs back to my Roku Device and hey presto Dolby Digital Surround is available on Disney plus and Now Tv but with one big issue that the Lip Sync is out and cannot be restored to normal so totally unwatchable.