Confluence 5.8.8, Add-on Manager 2.20.2, hosted locally. I am attempting to manage an add-on. I go to "Manage add-ons" page and get the list of installed add-ons. If I expand an add-on entry by clicking on the ">" next to the add-on name, the entry expands and then the page automatically refreshes the entire list. This makes it impossible to manage add-ons.
I have tried it with several different browsers (Firefox, Chrome, Edge) and all exhibit the same behaviour.
Any ideas how to fix this?