Created a custom animation for a fab, but after using it, the size of the fab decreases?

Question

Java

I have 3 fab. When you click on the bottom one, the top two should open. If you set the upper value to visible, then when the application starts, they will be of normal size.

However, after the animation starts, they decrease in size. How to fix it (I will send animation files in the comments)

Answer 1

<scale
        android:fromXScale="0.0"
        android:fromYScale="0.0"
        android:toYScale="0.8"
        android:toXScale="0.8"
        android:pivotX="50%"
        android:pivotY="50%"
        android:duration="300"

        android:interpolator="@android:anim/linear_interpolator"/>

do you see anything suspicious?
for example here:
android:toYScale="0.8"
android:toXScale="0.8"