Samsung android 6.0.1 update for S6 lost my pattern

<p>This morning I updated my S6 software , just like I have previously done with my Samsung tablet, and to my surprise after the restart my unlock pattern was suddenly wrong. I tried a few time without luck (and this time the option to use my google account does not even appear) until I got to a point where I am getting 60min waiting periods to start again.</p> <p> </p> <p>I took my phone to smart care, Century City, and the receptionist (Trishana) quickly told me that they will have to wipe out my phone as there's nothing they can do and many other people came with the same problem and got the same answer. No one could really explain to me which password does my phone recognise if it is rejecting mine. Surely it is making reference to some pattern if it rejects mine, but no one could give me a clear answer.</p> <p> </p> <p>Also if many clients have had a similar problem, someone must have had looked into the problem to provide a more acceptable reason for this?</p> <p> </p> <p>I had no reason to anticipate removing the password from my phone as I have done previous updates with my other samsung device and experienced no problem.</p> <p> </p> <p>Can someone please tell me which pattern my phone recognises if not mine? Also a better way forward response would be greatly ? </p>