When I'm in the Comments pane, I want to use shortcut to navigate between the comments (with the comments shown in the context). However, the documented shortcut (Tab/Shift-Tab) is not working. The arrow key (up/down) is working for some parts, but in some cases, pressing Down arrow key goes back to the first comment on the page (or in some case goes to the previous page's comment) instead of moving to the next comment.

Please help.