One major issue is that it use the same 2,4ghz freqency as nany wifi nerworks, bluetooth, doorbells, baby monitors, microwave ovens etc. Which means that many issues can be caused if any of these systems are nearby. I can see in my notes from an older thread that SW 2,1 introduced the possibilty to shift channel, but only by the use of the B&O servicetool which means you would have to take them to a store or get a technitian out to get this done.
Hope you find another way to connect the speaker
Location: Denmark