Reported from a station running MSHV, WSJT-X and JTDX together: click a
call in MSHV and the entry field filled, emptied, refilled — once a
second — with the map zooming in and out to match.
Two causes, both about reading one program's statement as another's.
The clear was tracked per LISTENER. Several decoders commonly share one
multicast group, so an idle WSJT-X reporting no DX Call — which is simply
true, and which it repeats every second — was read as MSHV abandoning the
station it was calling. "The operator cleared the DX Call" is a statement
about one program, never about a socket, so it is now tracked per
program, and a clear carries the id of whoever made it.
And nothing arbitrated between them. The program that announces a station
now holds the entry field, and the others cannot touch it until it lets
go: it clears its own call, it stops sending (closed), or the QSO is
logged. That is the operator's own suggestion, and it is the right one —
between overs there is no way to tell "I have nothing" from "I am not the
one you are working" except by remembering who was.
Refusing another program's callsign is logged once per focus, not once a
second: an operator whose second decoder "stopped filling the call" needs
something to read.
