Why does Transparency Mode cut in and out on my Melomania Touch when I press the power button on my phone to turn the screen on or off?

This is due to the way the phone connects to Bluetooth and not the earphones.

Bluetooth operates in several modes;

• Call mode (HSP),

• Music mode (A2DP)

• Standby mode (idle)

The phone switches between modes, idle>>HSP>>idle when the power button is pressed, Transparency Mode is reset by this mode change.