Has anyone experienced their system going into a loop upon connecting to a station? When I first upgraded to 12 it run fine for a couple of weeks then it started looping (see pic). I had to revert to V 11.2 to get it to stop. I reinstalled V 12 completely from scratch to a new directory. It ran fine for a couple of weeks then it started again.
I connect and it starts sending "de callsign" over and over. I have again gone back to V11.2. It seems to work fine.
This happens with any station, regardless of what version of VarAC they are running. When this happens I am no longer able to send Vmail or transfer a file.
OS here is Windows 10
Any help, ideas appreciated

We would need to see a full transcript of a QSO from the connection until the disconnect. please attach one.