One of my contacts doesnt show last online any longer. Just blank under contact name. This first happened couple of days ago and I checked all other contacts show last online normally. I read from Whatsapp FAQ that it means contact has blocked me for sure. He is a colleague I talk to requrarly. I then sent him e-mail asking if hes blocked me and he said no he hasnt? He then msg me via Whatsapp checking it works. After this his last online showed normally for few days. Now since yesterday last online field is blank again! However I can still see if he is online, but last seen is blank again. Why is this? Doesnt this mean when you cant see "last seen" it does not mean you have been blocked? Then why its only one contact showing this? Strange.