setting the parameter parallel_force_local to false leads to data loss

does someone has experienced a problem with the parallel_force_local parameter?  

In a new created envirement, the database is EE 12.1.0.2.0 64 bit (Redhat), I observed following: In a PL/SQL Block several inserts + commit after each insert are performed. Sometime not all data are commited: Expected inserted rows is 1000. I repeated the test 5 times (each time the table is truncated) and I got this:  

1. only 127 rows are inserted (the sum of sql%rowcount = 1000)
2. 920 rows are inserted (the sum of sql%rowcount = 1000)
3. 1000 rows are inserted (the sum of sql%rowcount = 1000)
4. 1000 rows are inserted (the sum of sql%rowcount = 1000)
5. 1000 rows are inserted (the sum of sql%rowcount = 1000)

In the past I observed the same problem in our production environement (after a migration from AIX to Linux) our regression test had same problem, after each call a different result. My gut feeling I suspected the parallel_force_local parameter that was set to false. After setting the parameter to true everything works as expected (reg test is consistent).  

Best regards
Ahmed