Upgraded from M500 to 1gig broadband this week and got a new Hub5 to replace the Hub4 we had. The Hub4 has now gone back.
The problem I have is that my TP-Link Powerline adapter is now failing. It will connect and then go offline. I've reset them to factory defaults and also the hub with no difference. Also tried replacing with different powerline adapters with also no change. Is the something in the Hub5 that could block this operation?
Can you post the exact model of TP-Link Powerline adapters?
The HUB 5 can struggle with lower spec devices, however, it's usually ones limited to 10Mbps which is highly unlikely for the type of device you are using.