I mainly work from home, and my personal daily driver is an M2 Ultra MacBook Pro. My work system is a Lenovo P1 gen 4, with Win 11 24H2. Well-spec'ed "portable workstation" that the P1g4 is, it obviously does not have a built-in Ethernet port. I've used 2 different USB-C Ethernet adapters, one of which has worked fine with my backup ThinkPad T480s using the same cable. Whenever I use the Ethernet connection, connecting via RDP using the awesomely-named "Windows App" for macOS, my connection starts dropping ~50% of packets. Using Wi-fi, RDP works fine. I've seen some sites saying to disable UDP, but I don't see that option in Windows App. I've tried lowering the display settings to 16-bit, but that made no difference. I'm just using a ping to see the connection performance between my MBP and the P1g4.

Editing to add: I've tested the cable with my MBP, and it works fine - no packet loss to other systems on my LAN. The two systems are connected to the same switch - a fairly new Netgear 1Gb dumb switch.