Intermittent internet connectivity - frequent 'Unicast Maintenance Ranging attempted - No response - Retries exhausted' in the modem log

I keep losing internet connectivity. Looking at the modem logs I see things like:

'Unicast Maintenance Ranging attempted - No response - Retries exhausted'

'Started Unicast Maintenance Ranging - No Response received - T3 time-out'

'Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out'

I've had the tech out twice to check connections and cables, they both said my signal looks good. (the first tech did replace the connector at the point of entry).

I'm pinging google every 15 seconds to verify if I'm connected, my connectivity looks like this, as you can see it's quite spotty.

My modem is a netgear CM2000. I'm directly connected via Ethernet (I'm not using wifi to verify that the internet is up). Every time I call or chat to tech support I get nowhere with this issue. Am as a loss as to what to try next.

Modem stats are as follows:

Cable Diagnostic

Status: Good

Action:
Your setup looks fine. If you can't access the internet, make sure you properly activated the modem. If modem has been activated and you still can't access the internet, contact your service provider for troubleshooting help.
If you can access the internet but has other internet issue, the Netgear Cable Knowledge Base can provide additional troubleshooting info.

CM Status: Good

Downstream Status: Good

    Downstream Power Level: Good

    Downstream SNR Level: Good

Upstream Status: Good

    Upstream Power Level: Good

Current Time: Mon Jul 22 16:59:50 2024

Startup Procedure
Acquire Downstream Channel: 579000000 Hz  Locked
Connectivity State:          OK       Operational
Boot State:                  OK       Operational
Security:                   Enabled   BPI+
IP Provisioning Mode:       Honor MDD   IPv6 only

Downstream Bonded Channels
Channel LockedStatus Modulation ChannelID  Frequency     Power    SNR   Correctables Uncorrectables     
      1     Locked     QAM256     32     579000000 Hz     0.6     40.3     28857     56508
      2     Locked     QAM256     17     483000000 Hz     0.6     40.7     33511     48119
      3     Locked     QAM256     18     489000000 Hz     0.6     40.6     33149     47204
      4     Locked     QAM256     19     495000000 Hz     0.6     40.6     33732     46551
      5     Locked     QAM256     20     507000000 Hz     0.7     40.8     32363     45936
      6     Locked     QAM256     21     513000000 Hz     0.5     40.7     32192     46690
      7     Locked     QAM256     22     519000000 Hz     0.7     40.7     31285     42790
      8     Locked     QAM256     23     525000000 Hz     0.6     40.6     31378     46156
      9     Locked     QAM256     24     531000000 Hz     0.6     40.6     31231     46683
     10     Locked     QAM256     25     537000000 Hz     0.6     40.5     30651     46134
     11     Locked     QAM256     26     543000000 Hz     0.5     40.5     31647     48836
     12     Locked     QAM256     27     549000000 Hz     0.3     40.3     30823     48679
     13     Locked     QAM256     28     555000000 Hz     0     40.3     29785     48945
     14     Locked     QAM256     29     561000000 Hz     0.3     40.3     30423     49515
     15     Locked     QAM256     30     567000000 Hz     0.4     40.4     29318     48692
     16     Locked     QAM256     31     573000000 Hz     0.4     40.3     28850     49705
     17     Locked     QAM256     33     585000000 Hz     0.8     40.3     29294     52419
     18     Locked     QAM256     34     591000000 Hz     0.7     40.2     28025     51627
     19     Locked     QAM256     35     597000000 Hz     0.8     40.3     28214     50942
     20     Locked     QAM256     36     603000000 Hz     0.9     40.4     27919     51735
     21     Locked     QAM256     37     609000000 Hz     0.6     40.2     26572     50821
     22     Locked     QAM256     38     615000000 Hz     0.4     40     26472     50497
     23     Locked     QAM256     39     621000000 Hz     0.4     40.1     26337     50951
     24     Locked     QAM256     40     627000000 Hz     0.3     40     26294     51391
     25     Locked     QAM256     41     633000000 Hz     0.2     40     25959     51318
     26     Locked     QAM256     42     639000000 Hz     -0.2     39.9     24193     49138
     27     Locked     QAM256     43     645000000 Hz     -0.3     40     25108     50722
     28     Locked     QAM256     44     651000000 Hz     -0.8     39.7     24073     51030
     29     Locked     QAM256     45     657000000 Hz     -0.9     39.8     23769     49543
     30     Locked     QAM256     46     663000000 Hz     -1     39.7     23540     52157
     31     Locked     QAM256     47     669000000 Hz     -1.3     39.6     22438     48177
     32     Not Locked     Unknown      0     0 Hz     0.0     0.0     0     0

Upstream Bonded Channels
Channel   LockedStatus  ChannelType ChannelID   SymbolRate        Frequency       Power     
      1       Locked       ATDMA      3       5120 Ksym/sec       29200000 Hz       43.5 dBmV
      2       Locked       ATDMA      1       5120 Ksym/sec       16400000 Hz       42.5 dBmV
      3       Locked       ATDMA      2       5120 Ksym/sec       22800000 Hz       43.0 dBmV
      4       Locked       ATDMA      4       5120 Ksym/sec       35600000 Hz       44.0 dBmV
      5       Not Locked       Unknown      0       0       0       0.0
      6       Not Locked       Unknown      0       0       0       0.0
      7       Not Locked       Unknown      0       0       0       0.0
      8       Not Locked       Unknown      0       0       0       0.0

Downstream OFDM Channels
Channel   LockedStatus  ProfileID  ChannelID    Frequency       Power       SNR/MER    ActiveSubcarrier    Unerror    Correctable   Uncorrectable
      1     Locked     0 ,1 ,2 ,3     48     688000000 Hz     -0.72 dBmV     38.3 dB     1108 ~ 2987     34304583486     32065898597     9883
      2     Not Locked     0      0     0 Hz     0 dBmV     0 dB     0 ~ 4095     0     0     0

Upstream OFDMA Channels
Channel   LockedStatus    ProfileID    ChannelID    Frequency       Power
      1     Not Locked     0      0     0 Hz     0 dBmV
      2     Not Locked     0      0     0 Hz     0 dBmV

Event Log
         Time               Priority     Description