keep going off-axis on big jumps i don't know how to stop it?

I’ve been riding for about 5-6 years, and can speed through tech, can do hips, speed-jumps 5-8 meters… but every time theres a jump with a steep lip, or involves me going quite high, i keep coming off-axis/ tilt mid-air and its starting to mess with my confidence, desperately need help how do i stop this, and jump normally?