huge internet speed fluctuations on all devices including hardwired to modem.

Hello all,

For about the last two weeks we have been haveing internet speed randomly drop out to levels that are useless 1-10mbps. I have RCN 1000mbps down service and when working properly i get around 940 down. For about 9 months I have had no problems and now this problem arises. I am useing cm1200 modem connected to netgear nighthawk ax4300. this problem happens on all devices on wifi or hardwired to router and even hardwired to modem. Modem logs show errors that I am not able to understand. I have had several rcn techs on the phone and have done the usual reboot yata yata stuff. I finaly called again and they are sending a tech out tommorow moring. Hopefully he can verify that the lines are good. Anyone have any ideas? Modem logs below.