WhatsApp Desktop for Mac Notification Bug/Problem
As shown in the video, the notification banner does not slide out but fades out instead. In addition, the notifications are not shown in the notification center where it is supposed to be populated. This bug was first seen in version 0.2.7315 and was not present in 0.2.6969.
Running this desktop app on OS X El Capitan 10.11.6 (15G31) on my MacBook Pro (Retina, 13-inch, Late 2013).