Weird phasing effect after dissolve.

So i tried to dissolve my drum track to get better control over my sounds, but after this I’m getting this weird chorus/phasing effect on the high-hat. Any idea how to fix this or why it happened?

Edit: Found out that cubase had overlapped the miditracks, when it disolved, so i got it fixed, but I would still like to know how you disolve without this happening.

Personally, before I dissolve the track, I verify that all of the MIDI events are consolidated to one event (usually using the “Glue” function). Then I dissolve from that event by note. Do you have the same problem then?