See the attached graphic. I want to have a dotted slur during the crescendo to indicate no breath. Unfortunately this messes up Note Performer. The upper line plays as one would expect. The lower line plays mm 38-39 as if there is no slur.
It is a shame because the appearance is exactly what I want. I guess I can fake this out using an l.v. mark, but that will require tedious editing in ENGRAVE mode.