Insert property in Excel Header

Hello,

One of our client is using Excel headers for their template and they want to add some M-Files properties in there but I cannot find a way to do that since the headers behave differently from a normal cell.

If I try to insert using the M-Files add-in I get an error "Excel is busy". And copying the formula from a cell isn't working either. All I could find on the subject is a 9 years old forums post with the conclusion by the support that it's a known bug. Is there any way workaround or solution?

Thanks