To reproduce:

• Create a new BP with a Script task.
• Set script type to java
• Add several lines of code, e.g.
  System.out.println("Hello");
  System.out.println("Hello");
  System.out.println("Hello");

• Save, Close and re-open the process
• The script will read as:
  System.out.println("Hello");\nSystem.out.println("Hello");\nSystem.out.println("Hello");\n