I recently purchased one of the newer Lionel Bluetooth equipped Polar Express sets. It's a very nice set, although I've been having trouble with the Bluetooth. It runs fine with the Lionchief remote, but the Bluetooth signal seems to be lost easily. Initially on the club layout it lost the signal if I let it go to the other end of the layout and into a tunnel, which is understandable. Now under my Christmas tree at home it seems to lose its signal no matter how close I stay to it. Keep in mind it can't get any further away from me there than the included track in the set allows it to.
Has anybody else had an issue with a loss of Bluetooth signal? I'm running it with the app on an iPhone SE if that makes a difference. Losing the signal from two feet away seems a bit extreme to me.