You also will not get a notification for a streaming update. The only way to see if you have gotten any is to check the Maintenance tab in the GUI. The streaming update is also just a temporary supplement to the last full update. When a new full update package is received, the streaming ones you got in between regular ones are wiped out because they are included in the new full update package.
The connection also seems to only be periodically established. Mine goes on and off many times during the day.
Avatar FX6327X Desktop, AMD FX-6300 6 core CPU, Radeon R9-270X graphics, 8GB RAM, Windows 10 64 bit, Bitdefender Free antivirus, MBAM on demand
HP6140 Laptop, AMD A8-3500M Quad Core APU, 6GB RAM, Windows 7 Home Premium 64 SP1, Bitdefender Free, MBAM
Google/Asus Nexus 7 tablet, Qualcomm Snapdragon quad core 1.5ghz, 32GB storage, Android 5.1.1, Dolphin browser, Bitdefender Free All machines behind a NAT router