BC127 Melody 6.1.5 I2S slave WCLK issue

Hello,
has something been changed from Melody 6.1.3 to 6.1.5 regarding the I2S configuration? I am using the external digital transceiver WM8804 as I2S master with a fixed WCLK of 48kHz and 16bps and the BC127 as an audio source connected to a Bluetooth headset. With Melody 6.1.3 and the following audio configuration settings

AUDIO=1 1
AUDIO_DIGITAL=0 48000 64 100401
CODEC=6 OFF
PROFILES=0 0 0 1 1 0 0 0 0 0 0 0

the command “open xxxxxx a2dp” will open an audio link with 48kHz. Exactly the same settings with Melody 6.1.5 and 6.1.8 RC2 result in an audio link with 44.1kHz. Must the configuration been changed for 6.1.5 ? Actually I don’t understand the behaviour.

Thank’s
Peter