Latency spikes every 10 minutes

For a few weeks we've been experience latency spikes predictably every 10 minutes. The spike only lasts a few seconds, but is very noticeable when in an online call or when playing games since there is a brief disconnect. We haven't moved or made any hardware changes. The issue occurs with both ethernet and Wi-Fi connections. The gateway logs don't show any issues other than firewall logs, which have a high number of drop attempts. I'm not sure if that could be contributing to the issue and am unsure if the numbers are any higher than before the issues began since we can't recall exactly when it started. Gateway model is XB7 model TG4482A.

Examples showing a spike using ping -t www.comcast.net

Reply from 2600:1406:bc00:696::1b62: time=19ms
Reply from 2600:1406:bc00:696::1b62: time=24ms
Reply from 2600:1406:bc00:696::1b62: time=18ms
Reply from 2600:1406:bc00:696::1b62: time=19ms
Reply from 2600:1406:bc00:696::1b62: time=19ms
Reply from 2600:1406:bc00:696::1b62: time=3402ms
Reply from 2600:1406:bc00:696::1b62: time=37ms
Reply from 2600:1406:bc00:696::1b62: time=19ms
Reply from 2600:1406:bc00:696::1b62: time=19ms
Reply from 2600:1406:bc00:696::1b62: time=18ms
Reply from 2600:1406:bc00:696::1b62: time=18ms
Reply from 2600:1406:bc00:696::1b62: time=19ms

Ping statistics for 2600:1406:bc00:696::1b62:
    Packets: Sent = 102, Received = 102, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 17ms, Maximum = 3402ms, Average = 53ms

Reply from 2600:1406:5600:687::1b62: time=33ms
Reply from 2600:1406:5600:687::1b62: time=28ms
Reply from 2600:1406:5600:687::1b62: time=29ms
Reply from 2600:1406:5600:687::1b62: time=32ms
Reply from 2600:1406:5600:687::1b62: time=27ms
Request timed out.
Reply from 2600:1406:5600:687::1b62: time=27ms
Reply from 2600:1406:5600:687::1b62: time=26ms
Reply from 2600:1406:5600:687::1b62: time=25ms
Reply from 2600:1406:5600:687::1b62: time=28ms
Reply from 2600:1406:5600:687::1b62: time=28ms
Reply from 2600:1406:5600:687::1b62: time=29ms
Reply from 2600:1406:5600:687::1b62: time=27ms
Reply from 2600:1406:5600:687::1b62: time=35ms
Reply from 2600:1406:5600:687::1b62: time=27ms
Reply from 2600:1406:5600:687::1b62: time=27ms

Ping statistics for 2600:1406:5600:687::1b62:
    Packets: Sent = 117, Received = 116, Lost = 1 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 25ms, Maximum = 42ms, Average = 28ms

Using PingPlotter to confirm that it's happening in 10 minute intervals

Firewall logs