Models: Aerophone Pro AE-30, Aerophone AE-20/AE-20W
On your mobile device, the issue may be resolved if you switch Bluetooth off and then on again.
For Android users:
The Bluetooth connection may be unstable when “Battery Optimization” on the Aerophone Pro Editor is turned on. From the Settings > Battery > Battery Optimization list, select “Aerophone Pro Editor,” and select the “Do not optimize” check box.