Sean, can you list some details of your setup. Do you have the individual POE injectors or are you using a switch with POE? Have you tried to hook a laptop up to the same ethernet cable to see what speed it connects at (10/100/1000)?
Mine is on a 100’ solid copper cat6 connected to a netgear POE switch. These Netgear switches are rock solid with any other device I’ve hooked up so I’d be shocked if it’s that causing the problem. Laptop hooked to the same cable / switch shows 1000 Mb connection.
Another user indicated he has 4 of them hooked up to individual Ring brand POE injectors and says his all work fine.