v0.15.0 breaks LinearTransformationScene

[FyZyX]

Applying a matrix in a LinearTransformationScene no longer transforms the coordinate system.

Try a simple scene like this

class LT(LinearTransformationScene):
    def __init__(self):
        LinearTransformationScene.__init__(
            self,
            show_coordinates=True,
            leave_ghost_vectors=True,
        )

    def construct(self):
        matrix = [[1, 1], [3, 1]]
        self.apply_matrix(matrix)
        self.wait()

and you will see only movement in the horizontal and vertical directions, but downgrading back to v0.14.0 and rendering exactly the same scene yields the correct behavior.