Unhandled Exception: Bad state: Tried to use PaginationNotifier after `dispose` was called - flutter

Question

I have a StateNotifierProvider that calls an async function which loads some images from the internal storage and adds them to the AsyncValue data:
//Provider declaration
final paginationImagesProvider = StateNotifierProvider.autoDispose<PaginationNotifier, AsyncValue<List<Uint8List?>>>((ref) {
return PaginationNotifier(folderId: ref.watch(localStorageSelectedFolderProvider), itemsPerBatch: 100, ref: ref);
});
//Actual class with AsyncValue as State
class PaginationNotifier extends StateNotifier<AsyncValue<List<Uint8List?>>> {
final int itemsPerBatch;
final String folderId;
final Ref ref;
int _numberOfItemsInFolder = 0;
bool _alreadyFetching = false;
bool _hasMoreItems = true;
PaginationNotifier({required this.itemsPerBatch, required this.folderId, required this.ref}) : super(const AsyncValue.loading()) {
log("PaginationNotifier created with folderId: $folderId, itemsPerBatch: $itemsPerBatch");
init();
}
final List<Uint8List?> _items = [];
void init() {
if (_items.isEmpty) {
log("fetchingFirstBatch");
_fetchFirstBatch();
}
}
Future<List<Uint8List?>> _fetchNextItems() async {
List<AssetEntity> images = (await (await PhotoManager.getAssetPathList())
.firstWhere((element) => element.id == folderId)
.getAssetListRange(start: _items.length, end: _items.length + itemsPerBatch));
List<Uint8List?> newItems = [];
for (AssetEntity image in images) {
newItems.add(await image.thumbnailData);
}
return newItems;
}
void _updateData(List<Uint8List?> result) {
if (result.isEmpty) {
state = AsyncValue.data(_items);
} else {
state = AsyncValue.data(_items..addAll(result));
}
_hasMoreItems = _numberOfItemsInFolder > _items.length;
}
Future<void> _fetchFirstBatch() async {
try {
_numberOfItemsInFolder = await (await PhotoManager.getAssetPathList()).firstWhere((element) => element.id == folderId).assetCountAsync;
state = const AsyncValue.loading();
final List<Uint8List?> result = await _fetchNextItems();
_updateData(result);
} catch (e, stk) {
state = AsyncValue.error(e, stk);
}
}
Future<void> fetchNextBatch() async {
if (_alreadyFetching || !_hasMoreItems) return;
_alreadyFetching = true;
log("data updated");
state = AsyncValue.data(_items);
try {
final result = await _fetchNextItems();
_updateData(result);
} catch (e, stk) {
state = AsyncValue.error(e, stk);
log("error catched");
}
_alreadyFetching = false;
}
}
Then I use a scroll controller attached to a CustomScrollView in order to call fetchNextBatch() when the scroll position changes:
#override
void initState() {
if (!controller.hasListeners && !controller.hasClients) {
log("listener added");
controller.addListener(() {
double maxScroll = controller.position.maxScrollExtent;
double position = controller.position.pixels;
if ((position > maxScroll * 0.2 || position == 0) && ref.read(paginationImagesProvider.notifier).mounted) {
ref.read(paginationImagesProvider.notifier).fetchNextBatch();
}
});
}
super.initState();
}
The problem is that when the StateNotifierProvider is fetching more data in the async function fetchNextBatch() and I go back on the navigator (like navigator.pop()), Flutter gives me an error:
[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: Bad state: Tried to use PaginationNotifier after dispose was called.
Consider checking mounted.
I think that the async function responsible of loading data completes after I've popped the page from the Stack (which triggers a Provider dispose).
I'm probably missing something and I still haven't found a fix for this error, any help is appreciated.