Pull the WAN cable and plug it back in? Problem stops for a bit. Tech came back out, put in ANOTHER modem (#Hitron EN2251). Stays around this time. Problem starts within minutes. We have LTE backup. Pull WAN cord and flip to WAN2 - problem stops. Flip back to WAN1, works fine for a bit. Spent DAYS on this. Flipped WAN2 port to primary. Installed Copper GBIC in fiber port as WAN primary. Still happens. Wasn't hardware. Put an #Edgerouter inbetween our router and cable modem. Still happens.