Naturally I forgot to write down the game #, but in the last game I played it seems that with both Warlord & Archer (either one) in play, when it came time to buy, the autoplay treasure dialog box never showed up, leaving you to click each treasure one-by-one.
It was your opponent's Warlord. The game is cautious and becasue there is a restriction on how often you can play things when under the Warlord effect, the game plays it safe and disables autobuy/Autoplay Treasure.
In this case however it is unnecessary, as the cards that Autoplay Treasure considers for playing are not affected by Warlord. The developer is thinking about how this behaviour can be fixed.