Just bought a new external bluetooth adapter. So far it works much better, as long the distance of echo dot ist not more than 4-5m. On problem still persists. When connecting from my win 10 notebook streaming seem to buffer, means, when starting to play a song it takes up to 36 seconds till sound is comming out of the speakers. Same happens, when stopping a song, eg. in groove. The song keeps playing for quite a while.