bind service stops after 1 or 2 mins when phone is locked in some devices like oppo, one plus device

IN bound service when I lock the device after the 70- 80 seconds service stops I am testing on realme 3 pro and one plus 5 both having API 9 PIE. How to keep service running until the app is in recent activity. Even foreground services are also stopped. Thanks in advance.

from bind service stops after 1 or 2 mins when phone is locked in some devices like oppo, one plus device