Its as simple as the subject. When i create a patch with portamento, some times it sounds like a zap sound. Like if the last note was a really high pitched one, and the one that I actually play starts from there.
This doesn´t happen if i turn down the portamento.
I´ve found 2 threads about this issue, but none of them has an answer to this problem. One suggest to change the mono mode (but i´m in poly, don´t want to switch to mono), the other one recommends contacting access support: