Couchbase lite android unexpected behavior

Question

1. Creating a document and within a nested document with some properties and values

document : { "key" : "value", "key2" : "value2", "nested_object" : [{ ... nested object properties }] }

2. Defined a view and query to get all documents from database of this document type (adjacent to https://developer.couchbase.com/documentation/mobile/current/guides/couchbase-lite/native-api/view/index.html and https://developer.couchbase.com/documentation/mobile/1.3/guides/couchbase-lite/native-api/query/index.html)
3. First query -> I get the document with nested document (expected)
4. I change criteria for query, get no results (expected)
5. I change criteria same as in step 3, query returns document WITHOUT the nested object (unexpected)

Question: Is this expected? How can the same query return first with, then without the nested object?

Here a gist :

https://gist.github.com/ramden/4e268d31239c4578f6f9a01dfa5bd930