Hive box is empty after reading all the values - flutter-dependencies

Question

NOTE: This is my first stack question so i beg your pardon if i did something wrong here!
I am working on an e-commerce application, and i am using hive to function as cart storage if there is no account to store the items locally until account is added. I have worked wih hive multiple times and i looked in my previous problems to check if i'm wrong anywhere but in vain.
OfflineCartItem is an adapter, it is registered, hive is initialized and box named 'cart' is opened beforehand, no errors related that.
Adding an item
Hive.box<OfflineCartItem>('cart').add(
OfflineCartItem(...));
Listing the data
ValueListenableBuilder(
valueListenable:
Hive.box<OfflineCartItem>('cart').listenable(),
builder: (context, data, snapshot) {
print("length of box: ${data.length}");
log("keys: ${data.keys}");
log("Map: ${data.toMap()}");
List<CartItem> list = [];
data.toMap().forEach((key, value) {
list.add(CartItem(...));
});
log("keys: ${data.keys}");
log("Map: ${data.toMap()}");
return Column(
mainAxisSize: MainAxisSize.min,
children: list,
);
});
I checked the hive functionality in other projects of mine, upgraded hive related packages to the lastest version, and they are working fine.
Here's the output i am getting when listing the data using the code above
I/flutter (26340): length of box: 4
[log] keys: (22, 23, 24, 25)
[log] Map: {22: Instance of 'OfflineCartItem', 23: Instance of 'OfflineCartItem', 24: Instance of 'OfflineCartItem', 25: Instance of 'OfflineCartItem'}
[log] keys: ()
[log] Map: {}
I/flutter (26340): length of box: 0
[log] keys: ()
[log] Map: {}
[log] keys: ()
[log] Map: {}
I checked and the adding code is being executed!
Here the length of the box is 4, i used box.toMap() to print the contents, but after reading all the data using data.keys and data.toMap(), the values are gone and i am left with an empty page.
Removed the data.keys and toMap() so the forEach method would access the data first, the list now had the data. Got this response
I/flutter (26340): length of box: 3
I/flutter (26340): [CartItem, CartItem, CartItem]
[log] keys: ()
[log] Map: {}
I/flutter (26340): length of box: 0
I/flutter (26340): []
[log] keys: ()
[log] Map: {}
The valueListenable again removes all the data since the values in the box changed and i am again left with an empty list.
I am using a real device, Redmi 6 pro, MIUI 12.