AZ Chandler - constant packet loss

I have Cox Preferred 150 plan and use Arris Surfboard SB6180 modem.

I am working from home recently and noticed my Skype meeting call has severe audio problems.   I use Speed test from DSLReports and Cox and am seeing reasonable download and upload speeds (50-80Mbps Dn / 5-10Mbps Up).  However, my audio is breaking up a lot.  

So I started PingPlotter testing with laptop wire connected (No wireless here) to NetGear ORBI RBR50 router 1Gbps port.  I also did the testing with laptop connected to cable modem directly and seeing similar result.  

I am experiencing pretty bad packet loss throughout the day, with the worst from 10am-10pm.  As you can seem, the packet loss is 6.5 and 7.4% respectively at 9-10pm window.   Sometimes during daytime it is as high as 15-20%.   

https://imgur.com/i6y7Ij7

This doesn't just happen today, it has happened in the last two weeks (perhaps even longer but I haven't noticed until WFH recently). After calling Cox service, the CSR told me that my neighbor on the same street complained the same thing.  I am somewhat convinced that the problem is too many people sharing the same node in my neighborhood.  

The Cox cable "cylinder" (or pole for lack of a better term) has Cox orange flags surrounding it since Sep 2019.  It was planned to be upgraded to Fiber optical but nothing has happened in the last 6mon.  When can it be replaced?