Summary
Flow step choice condition for "Person was Deleted from SFDC" with 'in past' "7 days" causes campaign failure
Issue
This flow step choice type causes a campaign failure because it is not supported. This is expected behavior.
Solution
Customers have to use Member of Smart List as indirection for the desired filter condition. i.e. Create a new Smart List with the "Deleted from SFDC" filter. Then change this failing flow step choice to use 'Member of Smart List' with the Smart List just created.
Example flow step:
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