We've received a few complaints over the past few months about having to hit the note before a hammer-on / tappable / hopo note earlier than usually necessary. We looked into this and realized the feedback was well founded, specifically with runs of descending hammer-on notes (ascending runs were fine, for the most part, but not always). Notes that you had to strum before a hammer-on, or series of hammer-ons, had to be strummed earlier than necessary because of a bug in how we evaluated chords and tappable notes. I am extremely happy to say that, as of 3 minutes ago, we pushed a fix to the live site. Rock on!