Just noticed this started happening a bit ago. I've had this happen before, but simply rebooting the server fixed it. Haven't had this issue happen in over a year now. But now, doesn't look like rebooting the server is helping.
This is the onboard nic on an asus prime b560-m (here's the link to the specs)
will attach ethtool eth0,
a portion of ifconfig,
and diagnostics file.
yggdrasil-diagnostics-20240415-0151.zip