[Elecraft] KPA Hi Pwr fault additional info

[Len Chesler]

I am utilizing FW vers. 1.02 and connecting to the K3 via the aux bus cable. If I set the KPA500 "PWR ON" menu setting to OPER, the K3 will not show the "KPA500 OPER" on the display and apprently is not syncing.  In that state, if I transmit, the amp will immediately go into a Hi Pwr fault. (no matter how long I wait for the aux bus cable to sync).  

If ,However,  I set the PWR ON menu default to STBY and manually switch to OPER, the K3 will properly sync and will display "KPA500 OPER" and all is well.   
Could this be a firmware issue? Any suggestions?
Tnx
Len