Hi Johan Ostrava,
It’s tough to say whether this will reappear, but this has not been reported enough to say it’s a known problem. When connecting anything to a pedal, always remember to connect the cable to the switch/expression pedal first and then connect to the aux input of Eventide pedal, so that the proper loads can be detected. Should you experience another issue try to record the behavior on video showing the steps that were taken to get it to behave that way. Email firstname.lastname@example.org.