Hmm, I have 2 hardware and 3 software synths in my system - they ALL behave the same - I get the "tick" on the B.
However, the MPC should really be in effect for the duration of the minim PLUS the crotchet - I.E. "3" in the MPC Setting 2 Time Offset.
Fix this and no more "tick"
!NoteWorthyComposerClip(2.0,Single)
|Clef|Type:Treble
|Instrument|Name:"Viola"|Patch:41|Bank:0,0|Trans:0|DynVel:10,30,45,60,75,92,108,127|Pos:12
|DynamicVariance|Style:Sforzando|Pos:-9
|Dynamic|Style:f|Pos:0|Visibility:Never
|Text|Text:"arc."|Font:StaffItalic|Pos:9
|MPC|Controller:vol|Style:Linear Sweep|TimeRes:Quarter|SweepRes:1|Pt1:0,127|Pt2:3,45|Pos:15|Wide:Y
|Note|Dur:Half,Slur,Accent|Pos:-4
|Bar
|Dynamic|Style:p|Opts:Volume=127|Pos:-10
|Note|Dur:4th|Pos:-7
|Instrument|Name:"Pizzicato strings 1 (solo)"|Patch:51|Bank:127,0|Trans:0|DynVel:10,30,45,60,75,92,108,127|Pos:6
|Text|Text:"pizz."|Font:StaffItalic|Pos:9
|Note|Dur:4th|Pos:-7
|Rest|Dur:4th
|Note|Dur:4th|Pos:-5
!NoteWorthyComposerClip-End
BTW, the Instrument Patch for pizz strings gives me percussion on my Yammy synth. - there is a 127 in the MSB which isn't correct for that synth.