replied on January 23, 2017
Are you using the [Settings]CacheFieldValues attribute as described in KB 1013198?
You can now use the [Settings]CacheFieldValues and [Settings]MaxDropDownLength trustee attributes to control drop-down list behavior for list fields and dynamic fields. Set [Settings]CacheFieldValues to Yes to turn on caching for list fields and dynamic fields to speed up list re-loading. Enabling this attribute will also configure the Client to only retrieve list fields and dynamic fields once per client instance...