MIDIファイルの読み込みエラー 正しく読み込まず途中で数小節飛びます。他の演奏アプリに読み込ませると正しく演奏されるのでファイルの音源は飛んでいません。

He means that the MIDI files can't be read correctly, it will jump a few bars in the middle, but this doesn't happen when the same file is imported to other softwares. It doesn't happen to me now, I think that bug is already solved :)