DummyView animates child view with strange animation

[anotherdev]

The group and child layout are almost identical (except the group expand/collapse indicator). But when group expands or collapses, DummyView animate the children with strange pop in animation from right side (See gif below).

What could have cause this behavior?

[swellner]

I have the same problem with a textview.
Have you find a solution for this issue?

[anotherdev]

Nope. We kept it invisible until animation ended.