If you create a tripwire any length and you take out a pair of shears to break it, it turns into a regular piece of the sting that then turns back into a tripwire.
Steps to recreate it:
1. Make a working trip wire any length
2. Take out a pair of shears
3. Tap on the string (Don't hold because that will then break it after it turns into a regular piece of string)
Duplicate of MC-129055