Checking to see if this is just our system, or if this is a new 'feature' in 2020.2. If I go to the Manage Nodes page and select the top most check box to select all nodes spanning more than one page and then choose 'Select All Nodes' then choose Mute Alerts Now, nothing happens. If I choose the nodes from the current page only, I am able to mute the alerts. Can anyone else reproduce this?