A much later scene shows:

Snoke says something along the lines of "I gave you the visions and connected you two through the force so that you might come here to me.". Basically Snoke tricked them. He constructed the visions in their minds so it is nothing more than a mind trick. The visions are fake. Therefore, they dont have to come true to preserve the continuity of the movie, even if in some way they do. In that case, it would be Snoke causing his own deciet to come to pass.

In a much later scene, Snoke says something along the lines of “I gave you the visions and connected you two through the force so that you might come here to me.”

Basically Snoke tricked them.

He constructed the visions in their minds so it is nothing more than a mind trick. The visions are fake. Therefore, they don’t have to come true to preserve the continuity of the movie, even if in some way they do.

In that case, it would be Snoke causing his own deciet to come to pass.