Moving average returns inaccurate values

Hi MATLAB community,

I am using simulink for real-time classification using a trained Fine-KNN model. The input data for the model is a 50-point moving average vector [6x1]. I am using the DSP moving average block for this purpose with sliding window technique (window size = 50 and simulating using code generator). When I compare the input and the output of this block for real-time values, I get the following plot:

It is clear from the plot that there is something wrong with the output as there is quite a discrepancy between the input and the output. What could possibly be the problem or am I doing something wrong?

Thanks in advance.