Burbling sound from subwoofer

Sometimes when changing songs on tidal or moving from tidal to eARC the subwoofer makes a loud burbling sound/static noise for a few seconds and then returns to normal. It happend from like half a year. There is no issue when I connect the subwoofer via High level inputs from speakers. So only subwoofer coaxial output is affected. Also, was there a change to how the sub works? Because I recall, that some time ago I could have a subwoofer disabled in options, there was no noise, but the subwoofer received the signal. Now the subwoofer only receives the signal when it's turned on in the setting and the crossover is set. I have a crossover in my sub and I would prefer to get full range for speakers and full for sub.