EVAL-ADAU1442 GPIO with 96kHz

I am having trouble with the read / write registers for a volume control using
the EVAL-ADAU1442EBZ board and GPIO expansion - everytime I turn off the
device, the volume is reset to 0dBFS - the previous volume settings are not
stored... since I'm running the board on 96kHz (and ran into some prior issues
with SigmaStudio and 96kHz) I'm asking myself if this could be the cause of the
behaviour?

Thanks!

Gabe