As illustrated on Ticket #36498
It's a case of changing ExtraButtonBehaviour from 2.000 to 4.000 (2 - HotKey 4 - Price Lookup / Carrier Bag)
update traxs_pos_config set numeric_value = 4 where row_id = 24 nimbus_ApplicationCommands_ReloadConfig_all
1 = GiftVoucherButton + PriceLookupButton
2 = GiftVoucherButton + HotKeyButton
3 = HotKeyButton + PriceLookupButton
4 = Carrier Bag + PriceLookupButton
5 = HotKeyButton + CustomDescruiption Button(edited)