If the harness is pushed to the back of the Ring, foot movement will result in backwards motion or strafing. Ensure you have the harness on correctly (Velcro belt across your belly), and that you are not inadvertently pushing the harness back in the Ring while trying to walk. Also make sure the Ring cable is connected between the Ring and the left Tower.
To accommodate bigger users, please select the “Forward Only” mode in the Advanced menu of Omni Connect. Find more information about “Forward Only” mode here.