Wired connection degrades over time on Pro 7

I have a 3x Eero Pro 7 setup with the gateway connected to a fiber ONT with 2Gb service. Also connected to the gateway is my desktop, with just a standard 1Gb ethernet connection.

The wired connection to my desktop seems to degrade over time, mostly based on how long it's been since the Eero has been restarted. After 24-48 hours I will notice the connection slowing down, with latency and packet loss increasing. I can resolve the issue by restarting the Eero (giving me another 24-48 hours until the problem starts occurring again), but I've also noticed that resetting the wired connection in any way will temporarily resolve the issue too, although for a shorter time (couple of hours or so). Unplugging the cable, restarting the PC or just restarting the network adapter in Windows will all do the trick, but they only fix the issue for a short while before it starts occurring again.

Wireless never has an issue, even when my wired connection is in a badly degraded state.

This problem started when I upgraded from my old Eero pros to new Pro 7s. I believe it's been happening since day one (although at first I thought it was my ISP).

I've tried the following: Replace ethernet cable, update NIC drivers to latest, update Eero firmware to latest, swap gateways with another Pro 7 - None of these worked.

Replace Pro 7 gateway with one of my old Eero pros - Problem solved, solid connection for days. Obviously not a great solution though.

I searched but couldn't find anyone else talking about an issue that sounded exactly like this one. Has anyone else experienced similar and found a resolution?