Default Sola AOSX V1

Hello guys, I have a many bugs with my Sony MT27i.
Bugs are, lag when i dial someone from my contacts.
No back button when I zoomed photo in Facebook app.
Bug with resolution on KingSoft Office app.
Some apps don`t open it.
Sometimes, when i locked the phone, after not working power button, so I can unlock it.
And big problem with Google Maps app.
Maps isn`t responding.