I’m a little confused because you’re showing the manual mapping mode? Is that just to show the name? Can you just manually map it?
If you are having trouble with the automatic mapping the only thing I could think is the names don’t match (like with a trailing space in the sheet), but the default behavior of that would be to create a new header item which doesn’t seem to be happening for you.
Can you try deleting that column and trying again?
I had already followed your suggestions before posting. To clarify the issue further, I’ve created a video demonstrating my attempts to map and delete the field.
I was finally able to fix it through a rather weird process. I had to create this row at the end of the sheet and then move it to the actual position. When I tried to create it in the right position by using the “Insert 1 column left” context menu feature, it didn’t work for some reason unknown to me.
So, to replicate it, try creating a sheet with some columns and then insert a column somewhere in between.