[1000mp] MP and Field

[VE2FWW]

Hello 
I was just trying a Ft1000MP in CW mode this morning.
I have noticed that when the MP switches to RX in CW, I am hearing a "clic" or "clac" sound in the speaker ...Not very loud, but the clic is there.
I have two Feilds and noticed there is no clic or clac, when the Fields come to RX in CW...
I tried to adjust the delay but nothing to do.....What am I missing.....
I wonder if there is a cure for that little noise comming out of the speaker when MP comes to RX....
Thanks
NOEL