And usually when this happens I go to the main page and see the status that the connection has been established for a long time
Status [INTERNET] RED Connected - (2d 2h 20m 56s)
Have you or anyone else on the network noticed any actual internet outages that correlate with these times? Also check the Gateway Graph for any gaps that might indicate loss of connectivity to the ISP (even if it’s only for a moment).
Google Public DNS primarily uses UDP for standard queries, as it is faster and more efficient for most DNS lookups. However, it can also use TCP in certain situations, such as when the response size exceeds the typical UDP limit or when using DNS-over-TLS, which encrypts DNS queries for better security.