I had a strange problem arise just now. I've been chasing 7P8C on 15m, split on CW, sending my call via CWX F1 macro and hitting ESC as soon as I heard him start to respond to someone. All of a sudden my sidetone locked into a steady tone. Changing modes or active slices wouldn't make it stop, nor would ending SSDR. The radio was not transmitting, just generating the sidetone. I had to power down the radio and bring everything back up. Anyone else ever see this anomaly?