Timecode show jumping to the end

I have a show that has been running on the same console every week for 7 years and it has been run on almost every version of the Hog 3 in that time. Currently we are running 3.1.9 I started having issues at version 3.1.8. Sometimes when running the show the console will jump to the last timecoded cue in the show, it has done this three times at completely different times in the show, beginning middle and toward the end. Incoming timecode has not changed and comes from a Tascam 2424. What could cause this and how to prevent it. This is very dangerous becauase the last cue in the show that it always jumps to fires confetti.