Need more information.
What verion of C2 are you using?
What tests did you perform and how?
Is this the free or licensed version?
Can you provide the example you used as a test?
I'm using the licensed version of the staff.Just in my game no problem. Construct 2 flapping bird, flying games Intel xdk Cordova along with as a result of transfer from the many smart phone is not working properly.
Note : Missing my English is not very good I can write. I'm sorry for that