[Elecraft] K3S Speaker/Headphone Issue

[Rich]

When I plug in my headphones I still hear signals via my external 
speaker.   They are not as loud as the headphones but they are audible.
When I turn the MONITOR function to Zero it goes away, but I like to use 
the MONITOR function.

I did check the CONFIG and SPKRS+PHONES is OFF
Is there another setting I am not aware of?

I am seeing this on a K3 and a K3S

??
Rich
K3RWN