When a user clicks a button multiple times in quick succession, Bubble's safety mechanism — which prevents in-flight actions from being aborted during navigation — creates a brief window where the workflow can be triggered again. This can cause a navigation workflow to fire more than once.
What you might notice
Clicking a button rapidly triggers the workflow more than once
A navigation action fires multiple times, causing unexpected page transitions or duplicate data changes
Workaround
Add a custom state to the button to track whether it has already been clicked, and add an "Only when" condition to the workflow so it only runs when the button is in its unclicked (pristine) state. After the first click, the custom state changes and prevents the workflow from triggering again. You can read more about workflow execution rules in the documentation.