Problems with autofocus

Hi there, I have been testing my PP and seems like something is going wrong with the autofocus.
In built-in android it works for a while, then stops working and only manual focus works.
Throught hdmi is even worse, if I press the focus button everything gets blurry and I cannot do manual focus.
Also, any shake to the projector that triggers the need to refocus when it is like that automatically leaves me with blurry image until I manage to, somehow, do manual focus.
Can this be fixed or do I need a replacements?