[Elecraft] K3 - Intermittently, using Band switch to return to 40M and the mode is in USB

[J.K. Hooper]

I am scratching my head. 

Occasionally and intermittently, when I use the band switch to return to 40M, the mode will be in USB rather than LSB. 

Obviously I only operate on 40M in LSB, and that would mean that the last time that I was on 40M, it would have been in mode LSB. 

So what could I be doing that result in this happening. 

Thanks in advance, 

73, 
Hoop 
K9QJS
San Juan Island, WA