This happens intermittently. Everything works after a cold start with my PC and FT-891, but it suddenly stops working.
SYMPTOM: When I choose TX frequency in the lower or higher range while using the “Fake It” VFO, WSJT-X 2.6.1 switches the VFO on TX and brings it back on RX. For example, when it sends data, VFO tunes to 7.073 and back to 7074 on receive.
However, WSJT-X fails to switch it back to 7074 after a while. So, VFO is still at 7073 on the next RX and tunes to 7072 on TX.
Do you have the same effect while using a direct USB connection between computer and radio for CAT control?
Honestly, I haven’t tried that. The cold start (reboot the computer, turn off FT-891 and on, then connect Digirig DR-891) always works.
I’m using DR-891; how am I supposed to connect CAT directly to my PC and still have my audio go to the USB port?
Yes, for the test you can run audio through Digirig and CAT through a direct connection to computer. BTW: if the issue only surfaces after the first attempt at transmission, but never before that then it likely has to do with RFI.
Thank you, K0TX! I will try later.
Also, the issue seems to occur only AFTER the vehicle power shuts down. My car has an 18A e-fuse, and I installed my FT-891. Some other accessories also consume 12V power, so sometimes, I forget to disconnect my PC power cable, causing the e-fuse to trip. This will shut down the FT-891. After the power recovery, everything works except the RX frequency on receive. Interestingly, even in this situation, I can switch RX frequency manually by selecting the “7.074MHz” in the WSJT-X menu. Still, during the QSO, I have to change the RX frequency to 7.074 after TX manually.
BTW, this is a great product! It’s so easy to set up, store in the glove box, and operate HF FT8 wherever I go in just three minutes! Thank you for creating such a innovative product.
i don’t want to muddy the waters but i’ll share my experience with the specifics of the issue.
my ic-736 radios all work fine using ‘fake it’.
frequency changes on vfo a ‘cycle’ back and forth on rx/tx.
my xiegu g90 hates ‘fake it’ and after exhausting the limited settings available, i’ve lived with ‘none’.
i’ve found that the xeigu has a good response over the audio spectrum while keeping the rig ‘centered’ on the ft8 watering holes.
the icom is only slightly less responsive on the edges but i do still run ‘fake it’ to get the most consistent output away from the center.
i know, no solution 
good luck
kb0wlf
Do you notice any change in hardware SPL setting in the radio before and after the power failure? It is possible that the split effect double ups between the transceiver Split setting and split simulated via the CAT commands.
@webmonkey Yeah, when my RX frequency isn’t back, I change the TX frequency around 1500Hz so that the CAT doesn’t need to change VFO…
@K0TX Thank you for your advice. What is “hardware split setting”?
That’s the split setting in the transceiver which will shift to a TX frequency (e.g VFO B) that’s different from the RX frequency (e.g. VFO A)
