Preview Random Document in the View tab doesn't show the actual values for rev, expiration, flags

build-1710

case could be simple, for instance, on python:

for i in xrange(self.num_docs):
pref = str
self.docs["id" + pref] = "value"*100 + pref
for doc in self.docs:
self.awareness.set(doc, int(self.expiration), 0, self.docs[doc])

for i in xrange(self.num_docs):
pref = str
self.docs["id" + pref] = "value"*10 + pref
for doc in self.docs:
self.awareness.set(doc, int(self.expiration), 0, self.docs[doc])

create view, and using Preview Random Document feature we can see metaInfo in which values for rev, expiration, flags are not changed at all

{ "id": "test_docs-529", "rev": "1-00000000000000000000000000000000", "att_reason": "invalid_key", "expiration": 0, "flags": 0, "type": "base64" }

are there any reasons why it works that way so far?