Recently I bought a Pure Jongo T2 speaker and suddendly I faced an issue using spotify on my smartphone (HTC one M7) over bluetooth. When I play music using Spotify, the "data flow" ( sent via bluetooth ) has frequent interruptions and consequently the songs playing "has the hiccups".

Notice that when I play music stored on my phone using standard music app from google, it works smootly. So after these tests, I could attest that the issue is a kind of synchro/buffering problem between spotify and the Jongo speaker over bluetooth.

What can I try to resolve this annoying problem ?

Maybe could I check the bluetooth protocol versions compatibility ?

Thanks in advance for any hint!