Asset search doesn't find Assets with extension when using Elastic Search/Infinispan indexing

In Projects perspective import "Employee Rostering" example project and enter "Employee.java" (with extension) into asset search field and press enter. When using Lucene for indexing this finds the asset, but with Elastic search / Infinispan it doesn't (see screenshot). But when you write just "Employee" (without extension) it works the same in both (finds all assets with Employee in name).