Ok so think I have this fixed I was doing:

 using (var umbracoContext = _umbracoContextFactory.EnsureUmbracoContext().UmbracoContext)
        {
            content = umbracoContext .Content.GetById(docArgs.ValueSet.Id.ToInt32());
        }

What i needed todo was:

using (var umbracoContext = _umbracoContextFactory.EnsureUmbracoContext())
        {
            content = umbracoContext.UmbracoContext.Content.GetById(docArgs.ValueSet.Id.ToInt32());
        }