The "Create a Room" and "Join a Room" links on the left side of Conpherence are too big. The result is that the mouse is on "Join a Room" while the active link is still "Create a Room".

Reproduction and version:
This effect is visible on the official Phabricator instance: Phabricator Conpherence
Just hover the mouse over "Create a Room" and then move it up to "Join a Room".

I also created a screenshot which shows the click-area: