[Elecraft] K3S Receiver Issue on FT8

[RVZ]

All of a sudden my K3S isn't receiving FT8 signals that are transmitting on frequencies under 950 khz even though it receives signals fine that are transmitting between 950 to 3,000 khz.  The receiver acts like I have the K3S filter width set to 950 or 1,000 khz but fact is the 2.8 khz crystal filter is selected along with a DSP width of 2.8 khz. Any ideas why my K3 is no longer receiving FT8 signals transmitting between 200-950 khz?By the way, my second K3 receives FT8 signals on all frequencies fine so the problem doesn't appear to be WSJTx software related. Thanks!  Dick- K9OM