dsp_adaptive_nlms error when the input source_sample is a very low value

[QuinnWang]

In the app_adaptive.xc, change the first input parameter in dsp_adaptive_nlms from Q31(0.08) to Q31(0.0008), then will encounter the problem:
Normalized LMS 5
Unhandled exception: ARITHMETIC, data: 0x00000000

The problem should be the input value is too small to cause the dsp_math_divide to have a 0 divider.

This will happen when customer using the real world PCM samples (mute audio or very low amplitude audio samples)

Please advise if it is usage problem or lib code problem, thanks in advance.