Bug in label behavior in New Zoho Mail - Displaying labeled emails works only the first time

Bug in label behavior in New Zoho Mail - Displaying labeled emails works only the first time

Hello,
I really like the New Zoho Mail.
I want to report something I have noticed with the labels.

When I click on one of my labels, e.g. "important", zoho displays all emails with that lable. Fine.
But if I then click anywhere else, like the inbox or another label and then go back to the same "important" label no emails are diplayed. I have to reload the page to reset the situation.

This happens everytime with all the labels. They only filter emails the first time.

Thank you