E750 ethernet replicator

I’ve been troubleshooting issues with my GL-E750. It seems to me the original USB-C cable that connects the router with the adapter is worn out and requires a replacement. I can tell this by having to fiddle with the cable until I get a stable WAN connection. Going to find a new replacement, I’ve tried some USB-C cables that I know for sure support data, proved this by plugging my Android into my Macbook, and I can transfer files, etc. But these cables don’t work for the E750. What should I be looking for in my new cable?