[Accordion] Prevent animation for default open item

[trangcongthanh]

How can I prevent the default open item run the animation on the first render? IMO, it should run only when the value changes.
When I have some items with default open state, my layout jumps every time it is mounted.

[benoitgrelard]

hi @trangcongthanh yes I think I agree with you, we've had a chat about it in the past and we need to look into how we can do this. We'll keep you updated.

[jjenzz]

I've created a PR to prevent mount animation when open by default here #977