Because ankle torque depends on the force acting on the foot and the center of pressure (COP) where that force is being applied, it may be possible that the approximated COP is more toward the toes (mass is more towards the toes). This would cause ankle torques to be higher than what might be expected. However, in reality, a worker might actually have their body weight more directly under their heels, which means that the actual ankle torque would be lower.
Most likely, depending on how the ground reaction force is applied to the body, it is possible that the ankle joint torques are overestimated in the model, which is typical in digital human models in general, but also generally ignored as work-related ankle injury due to overuse is uncommon. The Ergonomics/Kinesiology experts that have consulted with us have indicated that there is no data is suggesting ankle injury is common, this common overestimation of ankle torque seems acceptable in the industry.