I have been trying a lot lately to get this thing work.I'm using Joomla 3.6.5 and I am using JA University Template.I see when I log in through front end I am able to see the K2 edit icon for modules.but I don't see any edit icon for articles (K2 items).I have literally tried everything from user groups mapping to disabling Gzip compression.
please, let me know if I'm missing something.