First I’m realy liking the new site!
I may have missed it but I think it’s missing a [Next] button when reading the [New/unread messages], resulting in the reader having to continually return to the [unread Index] to click on the ‘next’ post to be able to read the next unread message.
As an example, This was the [New/unread messages] view:
When I click on one of the messages to read it I see this:
Maybe the [Next] button is hidden or I overlooked it?
All I can see at the bottom of the view window is: [like], [Share], [More] and [Reply] buttons.
I was using Firefox Browser 83.0 (64-bit) on my Windows 10 PC.