Using the default template for flap animation. The flap in complete retracted position, then you try to bring it down to the 1st flap setting, and the animation doesn't happen. You bring it down to the 2nd setting it goes from fully retracted to the second, and so on. If you retract from the 2nd position to the 1st it does show the animation correctly to the first. The issue is when you want to bring it from 0 to the 1st.
We done everything according to this to no avail https://docs.flightsimulator.com/html/mergedProjects/How_To_Make_An_Aircraft/Contents/Modelling/Airframe/Animations/Animating_Ailerons.htm?agt=index
Is this a known issue?