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zBitx built-in FT8 another problem with complex callsigns


 

Today I managed to do three POTA activations with my zBitx. Everything went fine, with the only exception that I couldn't complete QSO with those using complex callsigns.
Below is an example of related records exported from my "messages" table in sbitx.db:
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41796,FT8,14074600,20250524,93629,0,SP5DAA IK1MJK/P -06
41817,FT8,14074600,20250524,93630,1,IK1MJK/P SP5DAA R-01
41819,FT8,14074600,20250524,93659,0,SP5D IK1MJK/P -08
41843,FT8,14074600,20250524,93700,1,IK1MJK/P SP5DAA R-01
41846,FT8,14074600,20250524,93729,0,SP5D IK1MJK/P -09
It looks like despite the fact that my response is "IK1MJK/P SP5DAA R-01" my interlocutor sees my callsign as "SP5D".
That's similar to the problem that I reported before: /g/BITX20/message/118390?but even worse.
That means that it's not only me who can't use a complex callsign, but also I can't have a QSO with others having complex callsigns.
In a standalone SOTA/POTA radio it is a big problem :(.
I know, that using WSJT-X on a computer/laptop may be a solution, but that negates the benefit of having a small transceiver with built-in FT8 support.