If an ArcGIS Online web map has 'contains' and 'equals' search by layer capabilities, searching for layers using a string of text in Collector for ArcGIS (Windows) does not complete even though the records are returned by the query in ArcGIS Server.
Development cannot reproduce this scenario using Collector 10.4.1. In issuing a search within the app returns successfully with features from both layers configured for feature search, as well as places matching the search criteria. Currently, a maximum of 12 features is returned from feature search.