Hello,
In the troubleshoot file I see several configuration options, which indicate that the device has been updated from legacy firmware versions with current configuration at the time transfer to the new versions.
The issue seems to be caused by that, as some incorrect migration between the versions might have occurred, depending on the difference between the versions.
The simplest solution could be to reset the device to factory defaults.
However, if this is the least preferred solution, a couple of things that can be attempted:
- Disable Failover in from router's WebUI Network -> Failover page. I see that you are only using wired connection, thus failover is not necessary and a carry-over from legacy versions, where it was enabled by default.
- Login to the router via SSH and execute a couple of the following commands:
See if that helps.
Best regards,