Hi Rafael,
probably it occurs because for mobile applications, when using local Entities and local Aggregates (I guess this is the kind of Aggregate you are using) data is saved in the local storage of the device (in the internal Storage of the browser).
This means, that when you republish, there is still data saved in the Storage from the last time the last version of the application has been executed. Perhaps, this triggers the exception, due to inconsistencies in the version/data model.