We have always had 4 kanban boards that worked fine, over the last couple of weeks I have added around 20 new boards, when i create an issue I can view it on the board, the problem seems to be with 4 older boards, all of a sudden when I view the boards the issues are no longer there. If i create a new issue to these older boards, the issue creates but when I click view on board, it says that the board has no issues. Also if I click on one of the boards it says No issues are currently visible check the board configuration. All the projects are there, boards are there and issues are there but its as if they aren't linked. I am new to JIRA so cant work it out - please can anyone help. Many thanks