Not visible itunes tag "purchased by"

Tag "purchased by" (in itunes) is not displayed in mp3tag
Can you fix this if it possible?? Ty.
Here is the iTunes aac(m4a) file only with this tag:

Image from iTunes with this tag:

see here:

If you just want to know which of your tracks contains this "Purchased by", you can use exiftool
It shows it like this:

And for the record:
exiftool can NOT (over)write this tag: