Excuse me? Triggers are designed to play once by default. Have you applied a sound or a script to it?
Viewing post in Deleting a trigger after interacting with it?
The problem is that 1.10.5 itself is quite buggy, unfortunately. Your problem might be fixed already in latest dev build, so grab it:
https://cg8516.itch.io/easyfpseditor-ce/devlog/738937/bleeding-edge-builds