Articulation reacts too slowly in Iconica

Here is what I’m experiencing. I’m working on a project in 9/8 time signature, the tempo is 78BPM. I write a musical phrase in Violins 1 standard (Sections and Players), using different articulations: 1) Staccato, 2) Marcato+Sustain, 3) Marcato+Tremolo. Sometimes, when 2) or 3) follows a few staccato sixteenth notes, the volume of this following note (which is written in articulation 2 or 3) is suppressed. That is, I don’t get the volume that I want and that I effectively have programmed. I can’t figure out what the reason is. It doesn’t happen all the time, but quite regularly. Can anybody help me out?
Oh, I can add something more. When I repeatedly play the same phrase, sometimes it happens, sometimes it doesn’t. Wizardry? :grinning: