jt65-hf 1.0.9.3 has a bug from a long time ago.
When transmitting in mode single bw and is receiving a text from other station with RRR or 73 without any callsign, the program stops working and needs to close and open again.
This problem only appears in SINGLE BW but not in MULTI BW
I need to work in SINGLE BW because my PC is very slow.
If you have a fast PC it's not necessary to work in single BW and the problem does not appear.
Many stations send RRR and 73 without callsigns. I don't know why. It's a terrible problem.