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Hello, I am a corporate account user in South Korea, currently using Power Automate (PA).
Yesterday, I modified a flow by changing only the recipient in a “Send an email” action. I did not modify any variables. After clicking Save, the flow executed with the variables missing.
As a result, the flow ran successfully but produced outputs with empty or missing data, because the variables were no longer present at runtime.
I would like to understand why this behavior occurred. For your reference, I am using the new Power Automate designer.
Please explain the root cause of this issue and provide fundamental, preventative solutions to ensure this does not happen again.
Hi
This is a bug in the new Power Automate designer.
When you save the flow, the designer can accidentally remove or clear variable values, even if you only changed something small (like the email recipient).
Because of this the flow still shows “Succeeded” but the variables are empty → so the output is wrong.
Fix / workaround: Switch to the classic designer (top right), then:
The classic designer is more stable and does not have this issue. The variables are not lost during the run, they are removed when saving in the new designer.
Hope it helps!
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