eS78 + Axiom not working

[alx]

Hello all!

I recently acquired a 9" Axiom plotter for the cockpit of my sailboat, to complement an eS78 I have at the chart table. They're interfaced via an HS5, along with a Quantum radar.

However, the eS78 has taken a disliking to the Axiom. It seems to alternately acquire and lose the Axiom as a data master, causing it to nearly freeze as it endlessly alerts and quickly recovers: https://goo.gl/photos/XMCMs1zJiJwUin359

I also have a Quantum radar connected to the HS5, which both displays are capable of seeing and using when the other is offline, so I don't think there are network connectivity problems between them.

The Axiom, for its part, correctly identifies the eS78 on the network when prompting for which display to make the Data Master.

I applied all current software updates before making that video - same result.

Any thoughts? Could this be a Lighthouse 2 vs 3 problem?