Upgraded to JIRA 6.3.3 today, all was running great, read about the new performance improvements, however, seeing a tremendous slow down degradation when clicking an issue in a filter results list. It's taking 5-10 seconds from the time I click an issue until the issue appears on the right. I tried doing a locking re-index, restarting the service (Windows 2012 R2) etc. - no luck. Everything else seems to be running fine, just a big slow down in clicking an issue to showing it.