AndreyOrb

### Describe the issue I have this TF/keras model: ``` def build_model(): image_input = Input(shape=(None, 1), name='image', dtype='float32') img_width_input = Input(shape=(), name='width', dtype='int32') max_width = tf.reduce_max(img_width_input) mask = tf.sequence_mask(img_width_input, max_width)...