I bought a Bluetooth transmitter to let us listen to the TV on 2 Bluetooth device simultaneously. It connects to the TV via the digital optical port and transmits the sound to two Bluetooth devices. In the past, it worked just fine for a few months, but now when I connect the Bluetooth device to the transmitter the TV automatically shows a blue screen saying "You can listen music from your mobile device" with a play button and previous / next button, so I guess this is some kind of music player application. If I exit this screen the transmitter disconnects, so basically I can't have the headphones connected and watch the movie at the same time, which is very frustrating because I wasted a lot of money on the transmitter and now it's useless.
I tried to set the audio format to PCM but it didn't help.