On 9 Dec 2019 at 10:59, Joe wrote:

That happened to me a few times but
I noticed that each time it did,
either the sent or received signal
report boxes were empty.  Once I
filled them in (from the WSJTX line
item) I could hit Log and it would
continue....until the next time. 
Maybe 10-15 over the course of the
contest, which was about 14 hours
for me.

ah, I thought it was just my setup...
but I saw the same thing ... maybe about
5% or so of the time ... manually filled
the report box and it logged ok.

We don't get to test the RU mode
very often to find these little things.