[Bug] Doesn't respect animateTransitions bool

[QasimXAli]

Description

So found a bug where it doesn't respect animateTransitions true when the firstPageProgressIndicatorBuilder is lets say a shimmer but the list is empty and it shows the default texts for no more items. it doesn't animate from firstPageProgressIndicatorBuilder child to no more items default no more items texts.

Package Version

4.0.0

Platform

Android, iOS

Code sample

Code sample

                      PagedSliverList(
                        pagingController: controller
                            .bookmarkArtPostPaginatedProvider.pagingController,
                        builderDelegate: PagedChildBuilderDelegate<String>(
                          animateTransitions: true,
                          itemBuilder: (context, artId, index) {
                            return BehaviorSubjectBuilder<ArtPost?>(
                                subject: controller.$artPostById(artId),
                                builder: (context, snapshot) {
                                  if (!snapshot.hasData) {
                                    return const SizedBox.shrink();
                                  }
                                  final artPost = snapshot.data!;
                                  return const Placeholder();
                                });
                          },
                          newPageProgressIndicatorBuilder: (context) =>
                              const CustomLoader(),
                          firstPageProgressIndicatorBuilder: (context) =>
                              Column(
                            children: List.generate(5, (index) {
                              return const ArtItemShimmerWidget();
                            }),
                          ),
                        ),
                      ),

[clragon]

Thank you for bringing this issue to our attention. I have fixed animating between first page loading, error and empty pages in the new package version 5.
At the current moment, it seems animating between new page loading indiactors, errors and items is also not functional, due to how these are built internally. Right now I cannot come up with a solution for that.