[BUG] Result of model computing does not align with tf python

[AsakusaRinne]

Here is the minimal example to reproduce it (the loaded model is a model used to train mnist):

C# code:

        var model = keras.models.load_model("xxx");

        model.summary();

        model.compile(new Adam(0.0001f), new LossesApi().SparseCategoricalCrossentropy(), new string[] { "accuracy" });

        var x = tf.reshape(tf.range(0, 784, dtype: TF_DataType.TF_FLOAT), (1, 784));
        var result = model.Apply(x);
        var loss = new LossesApi().SparseCategoricalCrossentropy().Call(tf.constant(3), result);
        Console.WriteLine(loss);

Python code:

    model: tf.keras.Model = tf.keras.models.load_model("xxx")
    model.summary()

    model.compile("adam", "sparse_categorical_crossentropy", ["accuracy"])

    x = tf.reshape(tf.range(0, 784), [1, 28, 28])
    result: tf.Tensor = model(x)
    print(result, tf.float64)
    loss = tf.keras.losses.sparse_categorical_crossentropy(tf.constant(3), result)
    print(loss)

Model summary:

_________________________________________________________________
 Layer (type)                Output Shape              Param #   
=================================================================
 input_1 (InputLayer)        [(None, 28, 28, 1)]       0         
                                                                 
 flatten (Flatten)           (None, 784)               0         
                                                                 
 dense (Dense)               (None, 100)               78500     
                                                                 
 dense_1 (Dense)             (None, 10)                1010      
                                                                 
 softmax (Softmax)           (None, 10)                0         
                                                                 
=================================================================
Total params: 79,510
Trainable params: 79,510
Non-trainable params: 0
_________________________________________________________________

Both the results of forward and backward are different between python and csharp, which has a bad impact on model performance.