My eSimpler+Simpler is in Slice mode, with Gate turned on.
Let’s say I have 5 slices, which are mapped to midi notes C1-E1.
So any note from C1-E1 triggers a slice, and any note outside of that range doesn’t trigger this eSimpler. If I trigger a note from inside the range and outside the ranges at the same time, the video will continue to play even after I release the midi note. Since I’m in Gate mode the audio and video should both stop as soon as I release the midi note. Then the last frame remains on screen until you trigger that same note again.
I will take a look next week at this issue.
In the meantime I think you can create a workable situation by limiting the notes to only those who trigger slices. This can be done with Ableton’s Pitch Midi effect by setting the range & lowest parameters according to your situation.