Triples that exist in the database not returned with SPARQL

Question

I have triples ingested in a collection named (collec_1), and then I inserted triples using rdf-insert where those triples added to the same collection (collec_1).

When I use the estimate function to count how many doc in the collection I see that the triples exist, but when I query using SPARQL I see fewer triples returned.

SELECT *
FROM <collec_1>
WHERE 
{ ?s ?p ?o}

NOTE : I have increased the number of forests before ingesting triples to accommodate with the changes. Is this the cause? The triples may stored in different forests!