Following methods from cache API don't work properly with off-heap:

• get() returns value even for keys, which are not equal (for keys, which have same content, but key#equals() returns false)
• keySet() - from docs: modifications and changes to the cache will be reflected in the set and vice versa. This is not the case for off-heap.
• replaceAll() fails with class cast exception (e.g. in case of Cache<String,String> with java.lang.ClassCastException: java.lang.String cannot be cast to org.infinispan.commons.marshall.WrappedBytes)