Boris Glint effect how to question

I am using a glint effect in a RED 5.6 composition.
The scene where the glint effect is applied is fully static, but has animated light effects (some objects on the scene get highlighted in sequence); I want the glint to appear/disappear following these objects' brightness, but what I see is that glints tend to move to adjacent objects as they get highlighted, while what I want is the glints to stay in place (and just appear/disappear with the highlight changes). Hope my question is clear ? In essence , I haven't found a way to prevent glints from MOVING, I just want them to appear/vanish where they are.