Pdb still locks

Hi,
I was testing out your library and noticed that on visual studio 2015 (update 3) it still locks the original pdb.
I have checked cr_pdb_replace function to see if the pdb name is replaced and it does, but after cr_so_load, the original pdb is locked instead of versioned one.
does visual studio gets it's pdb path from somewhere else instead of binary ?