[Resolved]  Vivo Mobile India — app crashing issue on vivo z1x handset model

I recently bought a vivo z1x 64gb variant, while playing music app automatically crashing and music stops i've tried different apps gaana, saavn, even inbuilt music app also getting crashed. After screen time outs it's closing randomly sometimes closes after 2min sometimes after 5 mins. Please look after the issue. I've tried contacting vivo customer care service they asked me to factory reset my mobile after doing it also problem not yet solved and i have checked and tried all the settings option like autostart, high power consumption etc. No improvements.
Please help on this issue