A DESCRIPTION OF THE PROBLEM :
The documentation for https://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html#asPredicate
states
  Creates a predicate which can be used to match a string.
  Returns:
  The predicate which can be used for matching on a string

but does NOT say which matching method will be invoked on the matcher: matches(), lookingAt(), or find()

Decompiling shows that it's find(), but the docs should state that explicitly, especially since the provided phrase "for matching on a string" is lexigraphically closest to matches(), which is not the method that is used.