Cable Modem Uncorrectable codewords QAM Channel 471 MHz

My modem’s downstream power, SNR, upstream power, and OFDM MER are within normal ranges. However, after a reboot, downstream QAM channel 471 MHz has again accumulated 1,633 uncorrectable codewords, while the other 31 QAM channels are essentially clean. The same channel had 1,587 uncorrectables before the reboot. My event log also shows intermittent T3 timeouts and Lost MDD Timeout events. Please check for intermittent ingress/noise or a plant/drop issue affecting the 471 MHz region.