Can you go into your router and post some of your logs? Scrub out IP data! And hear me out because it seems simple but this JUST happened with my router: can you go to your modem + router setup and without disconnecting anything, jiggle the RJ45 connector where it connects into your modem? Does it lose connection? (if the LEDs on the back of it cycle entirely off for any amount of time, that indicates it is losing connection). Then, do the same for the RJ45 connector wiggle test for the one connecting to your router. Something is telling me you're actually just having a physical noise issue.