Just got 1.0.17 app and updated to fw 1447458797 by lecacy-mode with my htc one m7 (android 5.0.2, last official update) succesfully.

Is it possible that old hardware was not fully compatible with newer bluetooth-code and htc keep the old stuff with this phone? Or is there another problem that just fixed the same way? As you thought (and mentioned it beside lecacy-box) this problem should be fixed by android 5.0..