I have version 9.3.1 on my iPhone 6s Plus and every now and then when the phone rings I cannot slide to answer. No matter what I do or how many times I try my finger will not make the slider move to answer the phone. I saw this bug once before in iOS 8 I believe and it appears to have returned. I hate that bug. Have any of you experienced this yet? If this is a known issue and has been discussed already, sorry for not noticing. If several of you guys have come across this, is there a fix for that problem?