I had the same "problem" which was solved by spending £15 on Amazon to get an IR extender box that sends any IR signals that point vaguely near a small receiver discreetly positioned on the outside of a media cabinet to the 5-6 devices that are hidden out of sight inside it. This works without fault and supports any IR devices and requires zero networking or configuration. Sometimes low-tech solutions are best.
Thanks for the suggestion, That's something I had not thought of.
Ideally I would still prefer to get Bluetooth working but I could always fall back to this method if I cant.
Do you happen to know if there is a problem with the internal Bluetooth with this build?