@tinus The bug only happens in Notepad 7.7 onwards. Notepad 7.6.x works fine.
The bug is pretty serious, using the JS Decode option will increase RAM usage exponentially (many gigabytes) in a few seconds (checked with task manager).

Testcase
- In an blank document, type the following string: \u0048\u0065\u006c\u006c\u006f!
- Use the JS Decode option.
- If using version 7.6.x it'll decode to "Hello!". 
- If using version 7.7/7.8 Notepad++ will hang and it'll eat all the RAM until the computer also hangs.

Using Windows 10 LTSC x64, Notepad++ x64 as well. No other plugins other than default.