Running v2.6.0-rc5 on a 64-bit Win 10 (21H2) PC, 3.0GHz i7-9700 CPU and 16G RAM.
I'm participating in the FT Roundup contest that's running this weekend (3/4 Dec) so am using a configuration that uses the 'FT Roundup' option in the 'Special operating activity' settings.
All was going well, with no apparent issues with either FT4 or FT8, until I called a station with the callsign 3Z95PRK. My outgoing transmission was truncated and showed only '3Z95PRK G0H' This happened every time I called 3Z95PRK.
I've just checked my ALL.TXT file and the entries in there for my FT4 calls to 3Z95PRK are also truncated, and show:
221204_074030 14080 Tx FT4 0 0.0 2540 3Z95PRK G0H
Note that there's an extra space between the callsign of the station being called and the first letter of my callsign - in all the other entries in ALL.TXT for my transmissions there's only a single space.
I never did manage to work 3Z95PRK!
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Martin G0HDB