When I look (KVS or ExpertFlyer) for LAX/SYD I get:
QF 12 LAX 22:30 SYD 08:10 +2 388 0 R9 F2 A0 J9 C0 D0 W9 T4 Y9 B9 H9 K9 M9 L0 V0 S0 N0 Q0 O0

When I search using BA I don't even get the 388.

I called my TA (BA itself) and they still confirm that QF only books there 388 in R and F, not A.

So I guess it is only on that route. Bummer.