Steps to Reproduce the Issue

1. make sure current encoding is ANSI
2. type 立马

Expected Behavior

get 立马

Actual Behavior

only 立

Debug Information

Notepad++ v7.7.1 (32-bit)
Build time : Jun 16 2019 - 21:14:50
Path : C:\Users\Administrator\Desktop\npp.7.7.1.bin\notepad++.exe
Admin mode : ON
Local Conf mode : ON
OS : Windows 7 (64-bit)
Plugins : mimeTools.dll NppConverter.dll NppExport.dll