Funny. I JUST experienced this for the first time a couple days ago. I was playing a Virtual Live Stream event. The audio was fine for the first hour and then out of nowhere the audio became distorted across all channels, outputs, and in the headphones. I began to hear an audible crackling sound that sounded exactly like electrical “arching”. Sounds like a fire hazard. I am disappointed to say the least as I bought my units a couple of years ago, but have only used them at gigs a handful of times. They have always been kept inside and in weather tight cases. I sent in a message to support and hope to hear from them soon. This appears to be a common issue. I hope they would consider covering it under warranty.