I have two separate large customers who are both experiencing the same issue. They both have M-600 Panorama appliances in dedicated management mode with HA peers and dedicated log collectors.
After upgrading to PAN-OS 9.0.x (currently on 9.0.4) - the GUI is slow and refreshes after each change. For example, if you add a TAG to a rule, the section will refresh before you can click on another. If you drag and drop a tag between rules, the maximum you are going to get is two before it refreshes. If I'm performing multiple changes to a policy, after a few rules in it will start jumping back to the top of the policy after every refresh. It's very annoying and leaving a bad impression of the GUI with the customers.
Is this a known issue? Is there a fix to this issue? I'm struggling to find any answers through searching Live and other tech blogs.