Won't return back to inbox

[Tinkertron]

When I open an email, and finished reading, and I select to go back to inbox folder, it won't let me. I either have to click on another folder, or select an action to the current email I am on. Anyone else notice this?

[#2]

Same here I have to arrow back to see my inbox list....happening on 2 separate computers so looks like an Outlook issue?