I use an Android device version 6.0 or higher. The music I stream directly from this device drops after a short time.

One reason could be that your smart device is going into standby mode and dropping the connection.

Solution - add the devil Raumfeld app to your standby exception list, also known as your device’s “whitelist.” To do this, go to “Settings” in your Android menu and then “Apps,” “Advanced,” “Battery optimisation,” “All apps” and “Raumfeld.”