Rule runs over and over, infinitely

I have a fairly simple renaming (appending date) rule set up.
Hazel 4.3.4 keeps running the rule over and over, appending date repeatedly, indefinitely. Any tips? The folder is at iCloud-synced Desktop on Mojave.
Hazel 4.3.4 keeps running the rule over and over, appending date repeatedly, indefinitely. Any tips? The folder is at iCloud-synced Desktop on Mojave.