When you try to clear out values in certain fields while updating records via Easy import, you may observe that the values don't change.
Applicable to all releases.
To be able to clear out values via an import, the "Copy Empty Fields" checkbox in the transform map should be checked. Every time you import via the Easy import option, a new transform map is created with the "Copy Empty Fields" unchecked by default.
That's the reason, the value in the target record will not change even if you have a blank value in the Excel file.
Since this is not an option in the Easy Import feature, you need to import using import sets following the documentation below: