It is possible to pause and resume Vidispine API instances in Vidinet. When an instance has been resumed, the search index will be empty, i.e. the items and collection you saw before the pause are not visible anymore. To restore the contents of the search indexes (items, collections etc), you must perform a reindex:
PUT /API/reindex/item PUT /API/reindex/collection PUT /API/reindex/file PUT /API/reindex/acl PUT /API/reindex/thumbnails
Find more information about re-indexing in the API documentation.