newPageProgressIndicatorBuilder with animation rebuilds the entire list - but it's very laggy

[alexismoret]

Hello,

I setted the animateTransitions to true to make the firstPage loading with a fade transition, but each time a new page is added, it's the entire list that is re-build, not only the widget I setted in the newPageProgressIndicatorBuilder, the problem is that adding new page is very slow and laggy with animations because it rebuild the entire list internally with sliverAnimatedSwitcher, but it's not laggy when animateTransitions is false

How can I set the animateTransitions only at firstPageProgressIndicatorBuilder but not at newPageProgressIndicatorBuilder ?

Is it normal that the entire list is animated only for add the newPageProgressIndicatorBuilder at the bottom of the list ?

Thanks !