Netgear CM1150V seems to cause delays loading web pages

After installation of a Netgear CM1150V cable modem it appears that all web sites hesitate to load. The interesting thing is that speedtests routinely provide >400Mbps, but when attempting to surf the web every new page takes seconds to load. This didn't occur with my past customer owned modem with the same router. I went through some troubleshooting with Comcast Support and was assured that the modem was provisioned properly and that there were no issues on their side. Fast forward a few months and upon return from a two week trip overseas the delays seem a bit worse. After reading multiple forum posts I checked the cable modem stats and found lots errors, correctable and uncorrectable, on virtually every downstream channel. Any advise is appreciated. Cable Connection Frequency start Value This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect. Starting Frequency Startup Procedure Procedure Status Comment Acquire Downstream Channel 645000000 Hz Locked Connectivity State OK Operational Boot State OK Operational Security Enabled BPI+ IP Provisioning Mode Honor MDD honorMdd(4) Downstream Bonded Channels Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables 1 Locked QAM256 44 645000000 Hz -2.3 dBmV 40.2 dB 1519 418 2 Locked QAM256 17 477000000 Hz -1.7 dBmV 41.1 dB 1873 336 3 Locked QAM256 18 483000000 Hz -1.4 dBmV 41.2 dB 1838 1650 4 Locked QAM256 19 489000000 Hz -1.4 dBmV 41.1 dB 1935 1677 5 Locked QAM256 20 495000000 Hz -1.4 dBmV 41 dB 3531 1722 6 Locked QAM256 21 507000000 Hz -1.3 dBmV 41 dB 2337 1685 7 Locked QAM256 22 513000000 Hz -1.5 dBmV 40.9 dB 1851 1706 8 Locked QAM256 23 519000000 Hz -1.5 dBmV 40.9 dB 1839 1786 9 Locked QAM256 24 525000000 Hz -1.7 dBmV 40.8 dB 1778 1696 10 Locked QAM256 25 531000000 Hz -1.6 dBmV 40.9 dB 1876 1691 11 Locked QAM256 26 537000000 Hz -1.6 dBmV 40.8 dB 1711 1650 12 Locked QAM256 27 543000000 Hz -1.4 dBmV 40.9 dB 1794 1663 13 Locked QAM256 28 549000000 Hz -1.5 dBmV 40.8 dB 1538 1693 14 Locked QAM256 29 555000000 Hz -1.5 dBmV 40.9 dB 1780 2013 15 Locked QAM256 30 561000000 Hz -1.5 dBmV 40.8 dB 1806 1921 16 Locked QAM256 31 567000000 Hz -1.6 dBmV 40.7 dB 1867 1805 17 Locked QAM256 32 573000000 Hz -1.8 dBmV 40.7 dB 1866 1832 18 Locked QAM256 33 579000000 Hz -1.9 dBmV 40.7 dB 1889 1933 19 Locked QAM256 34 585000000 Hz -2 dBmV 40.6 dB 1843 1888 20 Locked QAM256 35 591000000 Hz -2 dBmV 40.5 dB 1676 1815 21 Locked QAM256 36 597000000 Hz -1.9 dBmV 40.4 dB 1847 1901 22 Locked QAM256 37 603000000 Hz -2.1 dBmV 40.5 dB 1801 1836 23 Locked QAM256 38 609000000 Hz -2.3 dBmV 40.3 dB 1781 1949 24 Locked QAM256 39 615000000 Hz -2.5 dBmV 40.3 dB 1745 1878 25 Locked QAM256 40 621000000 Hz -2.2 dBmV 40.4 dB 1627 1879 26 Locked QAM256 41 627000000 Hz -2.3 dBmV 40.3 dB 1720 2295 27 Locked QAM256 42 633000000 Hz -2.4 dBmV 40.3 dB 1783 2129 28 Locked QAM256 43 639000000 Hz -2.6 dBmV 40.1 dB 1945 2316 29 Locked QAM256 45 651000000 Hz -2.4 dBmV 40 dB 1931 2155 30 Locked QAM256 46 657000000 Hz -2.5 dBmV 40 dB 1809 2150 31 Locked QAM256 47 663000000 Hz -2.8 dBmV 39.9 dB 1926 2102 32 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 Upstream Bonded Channels Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 1 5120 Ksym/sec 17300000 Hz 45 dBmV 2 Locked ATDMA 2 5120 Ksym/sec 23700000 Hz 45.5 dBmV 3 Locked ATDMA 3 5120 Ksym/sec 30300000 Hz 45.3 dBmV 4 Locked ATDMA 4 5120 Ksym/sec 36700000 Hz 44.8 dBmV 5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV Downstream OFDM Channels Channel Lock Status Modulation / Profile ID Channel ID Frequency Power SNR / MER Active Subcarrier Number Range Unerrored Codewords Correctable Codewords Uncorrectable Codewords 1 Locked 0 48 688000000 Hz -2.9 dBmV 39.6 dB 1228 ~ 2867 17976418449 8078 441 2 Not Locked 0 0 0 Hz 0 dBmV 0.0 dB 0 ~ 4095 0 0 0 Upstream OFDMA Channels Channel Lock Status Modulation / Profile ID Channel ID Frequency Power 1 Not Locked 0 0 0 Hz 0 dBmV 2 Not Locked 0 0 0 Hz 0 dBmV Current System Time:Fri Sep 20 14:13:28 2019 System Up Time:65 days 15:35:55 Help Center Show/Hide Help Center