TAS6424M-Q1: Why is there an abnormality when connecting a speaker with a frequency divider

Hi TI

       The customer found the following abnormal phenomena during testing TAS6424M-Q1:

The TAS6424M-Q1 driver does not have any abnormalities with speakers without a frequency divider, but there is a probability that speakers with an LC frequency divider may not be able to output sound properly. The customer tested 16 chips and found that 5 of them had this phenomenon;

    Please help analyze the possible reasons. Thank you。