We have recently been making some changes to the torso movement system to support the unique 360-degree rotation capability of the UrbanMech. Some of these changes made their way into our February 17th patch, and caused some extreme behavior with torso twisting and centering. The more severe of these issues were resolved in our subsequent hot-fixes, but additional work was required to resolve the remaining issues.
We will be rolling out the remaining fixes for the torso and leg centering issues with our patch on March 3rd. Once that fix is out, torso movement and 'Mech centering should behave as it did prior to the February 17th patch.
In the meantime, enabling Arm Lock through your in-game settings should eliminate the current issues with 'Mech centering.
Thank you for your patience! We will keep everyone updated with more information as needed.