How to fix character glitch where character tumbles when his torso is 90° relative to Y axis?

I am trying to crate artificial gravity, but I have the dearest problem:

whenever the character comes near the bottom half of the planet, he tumbles and rolls and never stands up.

To make the gravity, I am using BodyForce and BodyGyro. Force is used to apply the force, and gyro to make vertical to the planet. BodyGyro causes player to reach 90° relative to Y axis and makes him tumble, but without BodyGyro character is unable to walk on the planet (except on the tip-top).

I am not sure what causes it: I tried editing Animation script, tried making HumanoidRootPart be in same angle, tried eiditing VelocityMotors (limbs and neck); but the result was always a failure.

I am hoping if anyone knows how to fix this annoyance.