I agree, that pg-music should mention somewhere, that there are compatibility problems with the usage of standalone-made SGU in the VST regarding bar settings in song. But in my case not the choruses were the problem, because I have not used them in the two songs, because the song structures were to complex. It seems to be enough to have a combination of groove changes and/or drum changes and/or usage of instruments from other styles to let the VST struggle and then all functions, that have something to do with the SGU generation or the checking of it, are reacting very buggy.