Hi Jack,
We can answer HW and register questions on this device. The DSP team supports the drivers.
If you want me to take a look at the schematics and registers, please send them. For the register settings, I need an I2C log of everything that happens from boot to when you notice the problem. Please use an I2C sniffer right at the I2C pins of the device. Also let us know the frequency of MCLK and WCLK.
Any trouble shooting of the software level would have to come from the DSP team.