Why backquote mark will be removed when the path is directly wrote in Apache IoTDB database?

I would like to ask a question about backquote mark in version 0.13 of Apache IoTDB. Now I'm testing writing speed and compativity of interface of IoTDB, and I found a problem. If using the Java native interface to write a path with backquote marks, the path in the database will contain backquote marks. If directly writing a path with backticks in the database, the path in the database will not contain backquote marks. Do someone know the reason that causes this difference? If this is a bug, how can I avoid this in my current version?