[GNC] Account export corruption (GnuCash 5.5)

[David Sumbler]

I am using GnuCash 5.5 on xubuntu 24.04.

Every couple of months or so I need to export about 30 accounts, all of
which are members of the same placeholder account.  I export them using
the "Export Transactions to CSV" option.  (I then process the
information further using Python, LibreOffice and Evolution mail.)

However, when I did this last night, I found that only the first
account is exported correctly: all the subsequent accounts are either
hopelessly corrupted or missing altogether.  The previous time that I
did this was before I started using xubuntu 24.04, and presumably I was
then using a different version of GnuCash.

Is this a known bug?  Do other users find the same problem?