So I've been having this issue for quite some time. I use my M5 as a computer speaker using the 3.5mm input. However, I cannot stream to the device using Google Cast if the cable is plugged in.
I've tried using an analog cable vs. an optical cable; i've tried manually switching the input using the Beoplay and B&O apps; and I've confirmed that the service does indeed work when no cable is plugged in.
Can anyone offer any suggestions or assistance?