Nativescript-couchbase: accumulating data?

Every time I call updateDocument from nativescript-couchbase, seems that data is replicated - I come to this conclusion after hitting the Save button of a page and inspect apps data throught Configurations in Android. Since each record has pictures stored in Base64, each update consumes several MBs. Even deleting the document, afterwards, doesn’t free up all the “extra space” besides the normal. Anyone seen that? For me, doesn’t seem like an expected behavior.