Strange whitening behaviour for ACs

[asyates]

Finding that i get different waveforms when setting whitening='A' (ALL) or whitening='N' (NONE) for single-station auto-correlations (whitening_type='B'), whereas from my understanding they should be the same as even with whitening='A', it should ignore auto-correlations.

Below is an example of the ZZ auto-correlation, where only differerence is the whitening param ('A' to the top, 'N' for the bottom).