Bug : scroll position is not set properly when passing initialItem to CustomCarouselScrollController

[giboin]

Describe the bug

When I specify an initialItem other than 0 to the controller of the slider, it shows the right item selected, but the scroll stays at 0, like if the selected item was the first one
Then if we move a bit the slider after it was created, it immediately jumps to the position where it should have been

Steps to Reproduce

• open the file record_box_view.dart in the example of the package
• in the _buildCarousel method, in the CustomCarousel widget:
  • remove the loop property (not required but it makes the bug more obvious)
  • add controller: CustomCarouselScrollController(initialItem: 4),
• launch the project and go to the Record Box section

actual behavior	expected behavior
same thing than if you don't pass any controller to the slider	the slider's ScrollPosition has the same offset than after calling controller.jumpToItem(4)

environement

tested on Android 12
Version 0.1.0+1

Great package by the way, thanks! 🙏

[Kal-Elx]

I'm also facing this issue.

My workaround is to not set the initialIndex but instead jump to the item using WidgetsBinding.instance.addPostFrameCallback((_) => _controller.jumpToItem(initialIndex));.

It creates a small glitch though so a proper solution would be nice.

Other than that I'm super happy with this package, thanks a lot 🙏