High HA Traffic

Question

Hi, 
 I have noticed that a HA pair at one of our sites has very high traffic on the HA interface (constant) see attached image. 
 What could cause this ? 
 We are setup on Hyper-V virtual UTM's as HA Active/Passive so only one node is ever the master. Also internet access is slower than normal, could this be related to this ? 
 The HA is showing as ACTIVE and READY so no sync in process.

DuncanNewell · Answer

Same here, eventually gave up and rebooted and this fixed the issue, so far it hasnt come back. But a bit strange that amount of traffic was constantly going over the interface.