https://www.dropbox.com/s/6fk3v5wfaexirs6/font_size_1.png?dl=0
LINE application's font size seems like not applied to rich message content sent by chatbot API.
https://www.dropbox.com/s/6fk3v5wfaexirs6/font_size_1.png?dl=0
LINE application's font size seems like not applied to rich message content sent by chatbot API.