Viscous' model disappears when using Metal Skin and Return Fire together

[carrotoniii]

It looks like when Viscous uses the actives of Metal Skin and Return Fire in tandem, most of his model disappears and the only thing that can be seen is his skeleton. His model looks fine when using either active individually; it only starts bugging out when both are active at the same time.
View attachment Viscous Model Bug.mp4