Recently, I have noticed that my Zoho Email inbox does not indicate I've received a new email, until I go to *another* folder and then return to the inbox. Only then will new emails be displayed. 

This has happened 100% of the time, during the past few weeks. Emails can fail to be displayed for hours, until I notice this and switch back and forth between folders. The "new" (i.e. unread) emails will then display immediately upon returning to the inbox.

I'm using Firefox v150.0 and always have Zoho Email open in a tab while browsing.

Anyone else experiencing this lately?