I assume so. I can't see the lock backing off. It has about a foot of cable still attached past the lock. This is the second I have had chew through. One last year and now this one. My guess is they are caught just after dark and have plenty of time to chew through the cable. I check my line as early as possible in the mornings but I guess it happens.
I can only imagine what their teeth and mouth look like after chewing out. The end of the snare is a bloody mess.
What dia. Cable you using?