What’s cables got to do with it? I have already mentioned all the troubleshooting that I have done, not sure what you mean by little things? If you have a suggestion on things to test, please share it. Things I have already done:
- Connecting it using a POE Switch (Mercusys 65W)
- Connecting using POE Injector (TPLink 15W)
- Connecting using POE Injector (Tenda 45W)
- USB Powered & Connecting directly to my router (Asus XT8)
- USB Powered & Connecting through a TPLink Switch (Gigabit)
- USB Powered & Connecting through a TPLink Switch (MultiGig)
- Items 1, 2, 3 with Sky Broadband Router (Not sure what brand)
- Items 1, 2, 3 with Eir Broadband Router (Huawei Router)
- All of the above with DHCP turned off (Static IP)
So what else you would suggest? Rewire my house? 
My network’s backbone is a pair of ASUS XT8 running AsusWRT. There are more than 55 other network devices, that do not have any issues. Some of these include 5 Reolink POE cameras, half a dozen ESP32 WT-ETH1, 4 mini PCs, 2 full size PC, a couple of work laptops, tado smart heating, shelly’s and an UZG-01 POE Zigbee dongle.
If you have a product that only works for certain networks then it is a product issue. Otherwise you have to call it out
Not sure why it is a big deal that support is assisting me, it is a bare minimum as their device is not working for me. I can say that the support has been exceptional but it doesnt excuse that I have wasted quite a lot of time on this and that my expectation that a product should just work with minimum effort is out of the ordinary.
A quick google search will show you also this is not just a problem for me. Even I am surprised that 2 devices didnt work, hence why I opened this thread as it could be an overall quality issue or due to some bad batch.