[Steven Zahm]

@ Jeff

Yes, the entries would still have the duplicated data because that is saved to the database already. Resetting the roles capabilities can not remove data saved to entries.

If this fixes it like it did last time, editing entry will no longer produce duplicates. Please give it a try. If that fixes it up, I suggest trying to figure out which plugin is not-so-helpfully altering capabilities that do no belong to it. Seeing as this is very intermittent for you, that could prove to be extremely challenging.