I've been cleaning the Special:CentralNotice page, deactivating and archiving expired campaigns. I entered a summary in the summary field, at the bottom of the table, however that reason isn't logged in the log. Thanks.
The code that handles campaign changes from Special:CentralNotice just got a major overhaul. The summary field appears to work. Could you maybe see if it works for you, and if not, help us discover more details? Thanks much!! :)