Same problem here, bluetooth speaker stops working after less than 1 min, using Rpi3 with onboard bluetooth
Code
21:30:34.711 T:1961724496 NOTICE: VideoPlayer: Opening: pvr://channels/radio/Alle Kanäle/pvr.hts_1803502268.pvr
21:30:34.711 T:1961724496 WARNING: CDVDMessageQueue(player)::Put MSGQ_NOT_INITIALIZED
21:30:34.713 T:1378608032 NOTICE: Creating InputStream
21:30:35.395 T:1378608032 NOTICE: Creating Demuxer
21:30:36.136 T:1378608032 NOTICE: Opening stream: 1 source: 256
21:30:36.136 T:1378608032 NOTICE: Finding audio codec for: 86016
21:30:36.143 T:1378608032 NOTICE: Creating audio thread
21:30:36.144 T:1370219424 NOTICE: running thread: CVideoPlayerAudio::Process()
21:30:36.145 T:1378608032 NOTICE: Opening stream: 1 source: 256
21:30:36.145 T:1378608032 NOTICE: Finding audio codec for: 86016
21:30:36.155 T:1370219424 NOTICE: Creating audio stream (codec id: 86016, channels: 2, sample rate: 48000, no pass-through)
21:30:36.645 T:1929376672 NOTICE: PulseAudio: Opened device Default in pcm mode with Buffersize 154 ms
21:30:36.667 T:1378608032 WARNING: CDVDMessageQueue(video)::Put MSGQ_NOT_INITIALIZED
21:30:53.474 T:1370219424 ERROR: CDVDAudio::AddPacketsRenderer - timeout adding data to renderer