Arsenal were denied victory by the woodwork, some heroic Burnley defending and the video assistant referee amid a dramatic late onslaught as Granit Xhaka's error ultimately cost the Gunners dear.
The Gunners thought they had been awarded a penalty against Erik Pieters but the spot-kick and the defender's red card for deliberate handball were overturned by VAR after replays showed he had diverted Nicolas Pepe's shot onto the bar with his shoulder.
That was not the end of the late drama as Ben Mee's block denied Aubameyang a sure-fire winner in stoppage time before Dani Ceballos crashed an effort against the post with almost the last kick of the game.