this
https://support.mozilla.org/en-US/kb/dns-over-https
https://simpledns.plus/kb/195-how-to-enable-dns-over-https-doh-in-chrome
it depends on the router model but it is likely that the modem is losing connection with the isp. maybe because the signal is weak during particular time of day.
https://www.speedguide.net/faq/what-cable-modem-signal-levels-are-considered-good-78
Indirect stimulus for the "investors" who then sell the pumped up memecoin and get free Government money.