Halo Bassinest Slanted?

Hi mommies! Hoping someone can share some advice... We use the Halo Bassinest and have been loving it, but that past several nights I have woke up in the middle of the night to our LO fussing.... when I look into the Bassinest she has slid to the bottom (the short side) and is scrunched up against the side! We also swaddle her so I feel awful that she is essentially trapped at the bottom of the Bassinest 😢 she is 8 weeks and 11 lbs, so not overly big. I can't believe that her weight should have the Bassinest slanting so much that she can slide like this???