reaxFF with kokkos fails to run


I had compiled kokkos with omp using the lammps version 31 March 2017. My system consists of a nanosheet immersed in solvent molecules. I had built four different system on which i had used pair style reaxc and all were running fine with ‘fix nvt all’. I then wanted to keep my sheet rigid and hence changed the fix such that it applies only on the solvent molecules. One of my system continued to run without any issues but the other three hangs after 999 steps.I reduced the time step to 0.1fs and the issue still persists; it hangs exactly at the 999th step. Is it a bug ? this is my input script: