Tied Electric Guitar, Untied Playback

I found out that there's a problem with the playback of the electric guitar. For some reason, when playing a five measures tied electric guitar, the playback decides to refer to the fifth measure as if the sound replayed without a tie, i.e. the playback sounds normal for four measures, but on the fifth it sound like there's a note with no tie at all. I did check and found that this happened only on overdrive, distortion and jazz tone.

Hope you can help,
(Hope for muse sounds of guitar, but I'll keep on dreaming)
Kurpaph.