expanded auto and header linestyle double

Greetings,

Using PG 10.1.

In my .psqlrc I have:

\x auto
\pset linestyle 'unicode'
\pset unicode_header_linestyle double

and when the output is expanded, I do not see a double line for the first
record, but I do for all subsequent records. For example:

% select * from artist;
─[ RECORD 1 ]─────────────────────────
artistid │ 1
name │ AC/DC
═[ RECORD 2 ]═════════════════════════
artistid │ 2
name │ Accept
═[ RECORD 3 ]═════════════════════════
artistid │ 3
name │ Aerosmith
═[ RECORD 4 ]═════════════════════════
artistid │ 4
name │ Alanis Morissette
═[ RECORD 5 ]═════════════════════════
artistid │ 5

I would like to have the initial "RECORD 1" line have the same "double"
linestyle as the other records.

Am I missing a config item?

Thanks!

-m