Animation and model transparency [what is the expected behaviour?]

When I set the whole model's opacity to 0.1, and start animation the model will show -by default- animated parts with opacity = 1. Which is good, i'm expecting my user to see only the animated part, not the whole model.

However, the animated parts are not all of them will be shown (opacity = 1) only some of it.

for example, in creo illustrate

on this step, I started by flashing the highlighted parts, then followed by unscrewing the nut and bolt. In Vuforia Studio/View, while the model is transparent it only shows the unscrewing with opacity = 1 (while flashing is not shown following model's transparency).

- I'm not sure what is the exact behaviour I'm expecting?

- What is the best practice for only showing the animated (instruction related) part?

Regards,