[GNC] Gnucash-3.0: What's going on with tab label truncation?

[lj]

Using: gnucash-3.0 on Slackware Linux 14.2

When an account's register is open, the tab should show the account name.
With GnuCash-3.0 I'm seeing something very odd. Account names of 6
characters and longer are correctly displayed using a tab of the correct
width. Account names shorter than 6 characters are truncated - with the
'middle cut out' as the help text says. (Actual behavior depends on the
character width, I think - it doesn't always start below 6.)

Examples:

"Salary" (6 characters) is shown as "Salary"
"Phone" (5 characters) is shown as "Ph...e"
"Cash" (4 characters) is shown as "C...h"
"Gas" (3 characters) is shown as "G..."
"OT" (2 characters) is shown as "..."

This is very strange. Why is it truncating short names, rather than only
long names?  (This is with the default preferences under Windows: Tabs: Width
30 characters, Position: Top.)