Hello @AkazaRenn 

Can I know who is your ISP and what is the VLAN ID required to connect to the internet?

As described in the firmware release note, the new 1.0.6 version has optimized the SFP+ port compatibility, but I cannot say sure if the issue you're reporting is related to this update. Have you tried to reconfigure the PPPoE connection by typing the VLAN setting parameters again after the upgrade?

To assist and figure it out efficiently, I'll forward your case to the TP-Link support engineers who will contact you with your registered email address later. Please pay attention to your email box for follow-up. Thank you.