Dimension error between standard matrix and Hankel type matrix

Hi, I am not sure if it is related to Toeplitz or something else but I rather mention it in case it can be fixed.

I was trying to multiply a Hankel matrix of dimension (25, x) with a vector (x,) but the result was a vector of dimension (26,) which should be impossible.

I had to transform the Hankel type matrix into a standard Matrix type as a workaround to get my (25,) vector.
