We just upgraded our DEV environment to 17.1. I found that search as you type doesn't function correctly on select dropdown fields that are fed by data objects. We use these lookup feature on just about every form we have and need the search as you type functionality to work. Some of the select dropdown have 1000+ entries. In 14.1 if I start typing a few characters and stop it'll open up the list and auto suggest a match. in 17.1 this is no longer happening.
Service Catalog 17.1 GA version
Service Catalog 17.1 broke the auto suggest feature. It is a bug in catalog 17.1 GA
Service Catalog 17.1 rollup1 patch