I’ve noticed on my last couple of flights were I’m getting a lot of white noise on frequency. The RX indicator was on. Tried pushing the volume or squelch button and made no difference. Switched to my KX155 to see if it was just that frequency and it was normal. Put up with the noise for about 75 miles, then it went away. Again turned auto squelch on and off and worked as advertised. Suggest? Thanks!