C. are sooo annoying. They break cables by biting them. As long as they keep their teeth in, the cable still works, since a C. transmits signals. But as soon as they need to relax or are bored, they leave the spot. They seem to have a conscience and return, if they notice, you need the cable. But they're very unreliable and it's better to look for a new cable.
How to fight it
Annoying and expensive, but not evil minded. If they have a go at really important technical equipment, they can threaten life, though. Keep your cables extra save. They go for weak spots like bends and breaks in the isolation. If you treat your cables well, C. are less likely to attack.gab