Like you guys said, it seems construct2 is only for prototype usage right now (wich is sad, and even for that it's limited now), we have to wait for some fixes (sadly from Google/chrome side). I knew Construct2 is a HTML based engine and i was fine with it (and actually it's a really strong one) i was reading everything i could find about optimisation, tricks to make the best of it, but right now (with the lastest issues) it's just plain impossible to make something pro with Construct2 (it happens even with the smallest prototypes now).
Like you may know, from browsers usage stats : http://www.w3schools.com/browsers/browsers_stats.asp
Has you can see, Chrome represent 60% of web browser usage ... So what does that mean ? We just have to wait and hope that Chrome fix that soon. Or move to another engine, and that pains me (yes i really enjoyed Construct2) ...
If anyone comes up with a fix for that let us know <img src="{SMILIES_PATH}/icon_e_smile.gif" alt=":)" title="Smile">.