update!
I have isolated the Moca devices on the cable without hooked up to TPlink equipment. No packet loss of as long as I tested it. About 4 hours. Laptop on both ends with an assigned IP address. They can ping plotter each other all day without loss, so that excludes the Moca devices and...
I have the EXACT same issue. Running TP-LINK Omada equipment and trying to use GoCoax moca devices. Packet drops every few minutes. 10-15 mins. Nothing wrong with the network setup as it is all business quality er7206, EAP773's, with OC200 controller, etc. Just would like to figure it all...