Gmail App is not differentiating Read and UnRead Emails in Vivo Android Mobile In Android Gmail App, It has unread emails with bold and read emails without bold to identify which emails are unread. But in my Vivo V7 Android Mobile I couldn't able to see that differentiations and all the emails are showing without bold and hence this app is not so helpful for me.

Below are the steps I tried,


Cleared Cache of App.
Signed out and Signed in 
Rebooting mobile
Tried al the settings


Nothing helped me. Please give a solution for this issue,
As mentioned by Robert and Andrew in comments, this issue was due to System Font, which was a custom one and not a default one. Once I changed to Default Font, I could able to see gmail is showing as normal fonts.