Download speed randomly dropping to nothing
I have had 500mb service with Xfinity for 4 years other than couple line services up stream that caused an area outage I have had no network problems at my home using a DOCSIS 3.0 modem Arris SB8200 all those years. I contacted Xfinity to renew my plan and decided to go for 1200mb plan. Shortly after doing that I started having internet download speeds drop all the way down to 0.3mb or 0.0mb download for 3hrs a day usually around 2pm MST to 5pm MST but it wasn't always at the same time of day or same duration. Some days it would drop down for only 20min but do it 3 or 4 times over the course of the evening. I called Xfinity and they said the system does see there is a problem and they dispatched a tech on May 8th I figured while he was here fixing the internet I may as well go grab a DOCSIS 3.1 Modem and get it installed at the same time so can get the full speed I'm paying for. The tech arrived and said he replaced the splitters and filters and re grounded everything and then he replace the modem with the Netgear Nighthawk CM2000. But he also said he found a problem at the tap with a signal being to high (I want to say he said 59db but could be remembering wrong) and that he was going to contact line maintenance department. Shortly after that was notified there would be interruption in my service from May 11-14th. On May 10th the internet was running slow again around 20mb download and I rebooted the Nighthawk Modem but when it powered back up ALL LED began rapidly flashing, I contacted Netgear and they had me preform a factory reset but it did nothing all leds continue to flash rapidly even after hours of waiting and they said i need to ship it to them for service and was most likely caused by my ISP signal. So on May 11th i returned the nighthawk and bought a Motorola MB8611 brought that home and installed in and activated it with xfinity app and it took off and started working with good 800mb download speeds but the Downstream LED is flashing blue instead of being solid and manual says it's Negotiating bonded channels but supposed to go solid eventually. But even with the Motorola I continued getting very slow speeds sporadically but i figured wait until the line repair is complete on the 14th. Well May 14th came and went and I continue to have the same issue with slow to no download speeds. So contacted Xfinity again and they dispatched another tech to come out on the 18th. This tech said he could find nothing wrong at all (of cousre the random issue was not occurring at the time of his visit). He said other than seeing the downstream led on the Modem blinking instead of being solid indicating it's not bonding and suggested I get another modem and then left. I feel 3 different modems is enough to say thats not the issue it is something else. PLEASE HELP attached modem diagnostics, I clear the event log on 18th and so only events from the 19th are in it.