We have a JIRA Software 8.4.2 recently installed on our server.
When a user logs JIRA on from a machine (notebook, desktop, etc) for the first time, the main horizontal JIRA menu is exhibited at the top of the screen as expected, BUT, if we click on any option, its sub-menu is NOT exhibited!
Then, the user must log off and logon again (twice or three times) until this menu starts behaving correctly.
Once it is working fine, the problem doesn't repeat on this same machine.
Thanks for your help.
Antonio Duarte.