Because of the nose up elevator..

Here's the explanation in one picture: [1]

Here's the article the picture came from: [2]

[1] https://3.bp.blogspot.com/-6c8hfXS8WO4/XKd93voscrI/AAAAAAAAF...

[2] https://www.satcom.guru/2019/04/stabilizer-trim-loads-and-ra...