facebook messenger font problem

since the last two days, the messages in my page messenger inbox on my PC all have fat font, just like they are not readen yet (unread). when i click the messages and respond to them,the font goes gray (grayed out as it should be). as soon as i refresh the page,every single message gets back to the fat font. why those stupid fukers don't test the stuff before they make stupid changes? i swear, they behave like kids. are they retarded?

instagramschrift is a beautiful font website that you can refer to

had this issue for 2-3 days, it gone now.