Ickl full-text queries with wildcards are affected by upper/lower case

If an attribute is annotated with
@Field(index = Index.YES,store = Store.YES, analyze = Analyze.YES)
a full-text search with wildcards can be used like this

from proto.Person p where p.firstName : 'wolf*ng'

It is expected that the query will ignore capitalisation. So a search 'Wolf*' 'Wolf*ng' 'wolf*' should find the attribute value "Wolfgang" and "wolfgang".
But only if the query is written in lower-case it will match the expectation