while in batch mode(exporting cache) when driver geometry of proxy wrap deformer is hidden its driven geometries are not updating it remains correct at initial frame and not moving anyway.
But when you unhiding it - everything is exporting normally.
Proxy wrap is using Bind tags - mapping by components.
When you disabling Bind tags whilst its hidden - everything is exporting normally
EM modes not affecting at all.
upd:
DG actually helps.. but its not the best workaraound
