Does bulk collect affect multiple sesssions?

Question

I have a piece of code that uses tables as well as PL/SQL tables and collections. This piece of code runs for multiple sessions (multiple companies in our business terms)

 create or replace TYPE TY_REC FORCE IS OBJECT
  (
   :
   :
  );

 create or replace TYPE  TY_TAB  AS TABLE OF TY_REC ;


  v_tab_nt.DELETE;
  FETCH v_tab_cur BULK COLLECT INTO  v_tab_nt;
  CLOSE v_tab_cur ;

  FOR i IN v_tab_nt.FIRST..v_tab_nt.LAST
     LOOP
       :
       :
          insert into xyz table --this table is present in multiple schema's
     END LOOP;

This is working fine in my dev enviornment ,but today's in productions i can see v_tab_cur is fetching data from schema1 and inserting data into xyz table of schema2,which looks strange to be ,the amount of data is huge. Can anyone make a guess of what is wrong with the bulk collect.