Issue with stop_sequences()

I have a requirement to kill all running sequences when reset comes in between. I do that by calling stop_sequences() for all sequencers. I see that all sequences except 1 got killed. I don’t know the reason for that. So after coming out of reset next time when I restart all my sequences I see that for this particular sequence 2 threads are active. Can anyone give me some debug pointers.

~Ashish