[GNC] Why does "Managed Document Link" send me to the wrong directory?

[Dr. David Kirkby]

I'm using GnuCash 4.12 on Ubuntu 20.04 Linux. When trying to attach a file,
the GnuCash GUI sent me to $HOME/Downloads. So I changed that to
/home/drkirkby/accounts/receipts-and-invoices. However, whenever I try to
attach a document, it starts from $HOME (/home/drkirkby/) rather than
/home/drkirkby/accounts/receipts-and-invoices. So I have to navigate to
/home/drkirkby/accounts/receipts-and-invoices each time. It's not a big
inconvenience, but I'm wondering why this is. Please see the attachments.
The numbers 1, 2 and 3 indicate the order I took the screenshots.

Dr David Kirkby Ph.D
Email: drkirkby at kirkbymicrowave.co.uk Web:
https://www.kirkbymicrowave.co.uk/
Kirkby Microwave Ltd (Tel 01621-680100 / +44 1621-680100)
Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3 6DT.
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