RB5009UPr+S+IN Ports "Uknown" when setting up PPPoE Client

Hi all,
Today, before doing anything else, I upgraded a fresh out of the box RB5009UPr+S+IN from ROS 7.8 to 7.16.2
The first thing I did was to configure the PPPoE Client. I doing so, under the general tab, I found a bug. I cannot select any ports. All ports show as Unknown. I did a factory reset to no avail. Routerboard is also updated to 7.16.2. So, any suggestions? If the solution to downgrade first, which OS version do you recommend?

Never heard of “unknown” port problem. And this is a new device.

Can you post a winbox snapshot of it?

Apart from upgrading RouterOS, did you also upgrade firmware (/system/routerboard)?
Anything in the logging that could be helpfull?
Can you share your current config?

/export file=anynameyoulike

Remove serial and any other private info, post between code tags by using the </> button.