Eth0 and eth1(USB) cannot be plugged in at the same time when turning on

Otherwise, the network cannot be connected.

When I plug in eth0 to turn on and then plug in eth1, there is no problem.

There is no update from you for a period, assuming this is not an issue any more.
Hence we are closing this topic. If need further support, please open a new one.
Thanks

Is it a necessary feature? why connect 2 eths on device? What kinds of use case?