Bedrock - Ambient music does not play on realm world, but does on other local worlds

Ambient world music does not play on my realm world (Audio settings confirmed 100%). Jukeboxes play and stop as normal. Cave sounds play every now and then.
Different local saves/worlds tested, ambient music plays fine. Also downloaded copy of realm world and played locally, still no ambient music. Any help on this would be greatly appreciated thanks. Playing on Xbox Series X. Realm world has been active over past 5 years if this helps.