If a Wi-Fi® connection is opened between the BlackBerry® Enterprise Server and a BlackBerry device while keys are being generated, the BlackBerry Enterprise Server may send the device two KEY_ACCEPT packets which leaves the device without an encryption key. (DT 904881)
Workaround: Users should regenerate the encryption key manually.
If you configure a device to use Wi-Fi connections only, and the device cannot connect to the BlackBerry Router, the BlackBerry Dispatcher drops the messages that it should be queuing so that the BlackBerry Enterprise Server can forward the messages to the device when Wi-Fi connectivity returns. (DT 650456)
If two device users swap devices and then failover occurs, the BlackBerry Dispatcher detects duplicate PINs and resets the PIN to 0 for one of the devices, causing the device to stop functioning. (DT 454394)
Workaround: Restart the standby BlackBerry Dispatcher before the failover occurs, or reactivate the user when the PIN is reset to 0.