[GNC] 'Total Period' shows 'Total' for one bank account

[G R Hewitt]

Hello everyone,
MacPro 2010 High Sierra 10.13.6
GnuCash 5.5 Build ID: 5.5+(2023-12-16)

I only just noticed, but I'm pretty sure it was correct before, that one
'child' bank account is showing the 'Total' instead of the 'Total (Period)'.
I have:

   - Run the check and repair (all of them)
   - Disabled and re-enabled the total columns
   - Installed GnuCash 5.4 - problem remains
   - Checked the settings of the account against an identical account, save
   the name

all to no avail.
An example set up is as follows:
Total        Total(Period)
Bank Savings            10,000         5,000
      A/c 1                     3,000          2,000
      A/c 2                      7,000         7,000  <---- should be 3,000

Any help in correcting this appreciated, thanks in advance.

GH