It sounds like some publishers blame browser bugs on C2 as well. For example the Android stock browser on old devices is really slow (no GPU acceleration) and can't play more than one audio track at a time, and on top of that can only start that track in a user input event, so it effectively cannot play any game sound effects, only a backing track. I reckon some publishers try a game in the Android stock browser and think "we can't accept Construct 2 games, they are very slow and don't support audio". Well, that is 100% the browser's fault, and will affect any HTML5 game using any framework... but we're not there to tell them that! It might be worth reminding them issues like that are browser bugs, not C2 bugs.