Got the new Digi891. At first works great but sometimes when changes frequency to transmit, it wont return leaving me slightly off freq. Example: Listening on 20m 14.074 it transmits on 14.0735. when done it wont go back leaving me to listen on 14.0735. On next transmission it goes to 14.073 to transmit the stays there. It doesn’t do this all the time. what setting do I have messed up? Never had this with my original digirig.