We have found an Ethernet bug that appears with some but not all gigabit hubs/switches. This is purely at startup and there are a number of ways to get past this initial startup issue. We are posting one of these on the main product webpage https://www.enterpoint.co.uk/products/cairnsmore-5/ . Once the gigabit link is up there are no further issues. There are no issues with 10/100 hubs and switches.

A work around is available now on the product webpage. We also noted that we don't tend to have the issue with D-Link gigabit switches but do see it with Netgear gigabit Switches. Others we don't know yet.