[pfSense Support] Intermittent Carp Failover on 1 of 3 interfaces

[Britton Kerr]

Since .88 I'll have one of my interfaces go backup while the others stay master.  There are no cable connection problems.  Once I disable carp on the master and reenable and sometimes I have to do the same on the backup the master will reassume on all interfaces.  Problems arise when users have apps open and this happens.  All carp interfaces should failover if one interface goes down (or is perceived as down).  There are actually two issues here.  1. Carp fails over on an interface when I can still ping it from the network...ie it was never really down and 2. if one fails they all should at the same time to keep the connections uninterrupted.  
This has been occuring about 3-4 times last week with with .88 (I disabled carp on Wed to keep it from happening anymore and it happened overnight after upgrading to 89.2.   What will be the best way help diagnose the intermittent failover problem?  Grab log file + screen shots before or after I get it working again? And which files?     
I'm running on production network with 30 or so machines now and will have 250 machines eventually behind them.