I did add couple of custom fields to a issue create screen (a drop down list called 'Issue Type' and a label field called 'Tags' and a text field) all worked for few days well and good. At some point the 'Issue Type' custom field disappeared, but i can see that from configuration. It is associated to that screen, but just wont show up when i try to create an issue. I tried removing it and adding back, but no luck. Now it is to the point that, no matter what fields i try to add to the create screen, none of them shows up, the changes just wont take effect, what could be wrong?