Are you saying that you are streaming from OSMC to a speaker? I have not tested this and it’s not supported at the moment. I am actually going to remove the ability to select a Bluetooth output via Kodi, because PulseAudio can badly break sound, especially for things like Passthrough. I must think of a nice way to allow PulseAudio sinks in Kodi without breaking things by default. For now the focus is on making OSMC an A2DP sink.
It can be tamed. By making it an App, you have full control over when it’s running (My OSMC → Services); and it only uses real resources when it’s handling a BT stream, so you should be OK.