Does not fully work with Shadow Trap (Thief Utility)
There are three parts to Shadow Trap: Placing it, Early Activation, and Trip Activation.
Placing it causes the runes to work as intended.
But using the other two do not, despite them being labeled as “Trap” skills.
Based on this information, the runes are not fully working, or the description should be changed to “When you place a trap”.
However, it would be really cool if it was working with the other two parts to it!