How to avoid printing special characters unicode value when the log handler is JSON

When I tried to print the logs with log handler "text", it is printing correctly but when I change the log handler to "JSON", the special characters are printed as their unicode value or something. Below is the example.

logs in Text: **<?xml** 
logs in JSON: **\u003c?xml** 

How to avoid printing **\u003c** in JSON log handler.