App Crashes when two firebase RTDB calls are made sequentially.

[hardikfuria12]

So in my app logic, once the user enters the Sales Screen page, it pulls customer and products data. When the app does try do that, it crashes without error log. I just tried calling "customer" data then it works but it does not work when both "customers" and "products" data is pulled

VIew

class SalesScreenView(BaseScreenView):
    def on_enter(self):
        if platform == "android":
            self.controller.get_customer_data()
            self.controller.get_product_data()

Controller (Just Showing product part code for brevity, but the customer part code is the exact same)

def get_product_data(self):
        self.model.get_product_data(on_data_change=self.on_product_data_change, on_cancelled = self.on_product_data_cancelled)

def on_product_data_change(self, data_snapshot):
        self.product_data = self.convert_data_snapshot_to_dict(data_snapshot)

def on_product_data_cancelled(self,error):
        print(error)
        return None

Model

def get_customer_data(self,on_data_change, on_cancelled):
        listener = ValueEventListener(on_data_change,on_cancelled)
        help = self.database.firebase_database.get_ref().child("fun").child("customers")
        help.addValueEventListener(listener)
    
def get_product_data(self, on_data_change, on_cancelled):
        listener = ValueEventListener(on_data_change,on_cancelled)
        help = self.database.firebase_database.get_ref().child("fun").child("products")
        help.addValueEventListener(listener)

Questions

1. Am i doing something wrong in the above case?
2. Has anyone faced such issues? is this common?
3. Currently my data is less than 1Mb in the cloud, would it make sense to just pull all data during on_enter? This would be not be ideal as in production I dont know how much would be present
4. Any idea on capturing logs before the app crashing?