For example, we have 15 offerings containing option with the word "iPhone" in its name. After using "iPhone" as search keyword, i only see 5 offerings in result. Looking to the log, i also see the query and some offerings are already found by Catalog but somehow only one third the offerings are displayed in front end. Behavior can be reproduced on both 220.127.116.11 and 17.1 RU3, RU5.
Release : 17.1
Component : CA SERVICE CATALOG