Guide Lines in Archicad 26 are appearing in manner where the white dash line is not coinciding with the coloured dash line.
However, in Archicad 25, it seems just fine (the white dash lines are creating a subtle background for the coloured dash lines).
Not sure, how it is appearing on windows version. I am using Archicad 26 (as well as 25) on macOS Monterey, using m1 max MacBook Pro.
In my opinion, it's a bug and should be addressed.