I have an import function for end users that employs the IMPORT action:
IMPORT [object] FROM [file] WITH VALIDATION
This has worked fine for years and I have not altered anything since instituting it. It gets used but I am unsure how often but I recently got a report that it was claiming the header column did not match the attribute name:

I checked and it's fine. When I moved a different column to the first column, I got the same error on that column. This validates it is reading the correct file.
Here's the file...

No starting or trailing spaces. It's perfect.
Can anyone validate it's working for you?
Can support confirm this action is working on your own test applications?