Android Question Activity_resume and lock screen problem

I have a game that pauses in Activity_pause and automatically resumes in Activity_resume. This works fine on some devices, and does not work on others. Specifically, the issue is when you suspend the device, and turn it back on. When it is waiting at the Lock Screen, Activity_resume is called on some devices (such as Samsung phones), and they game timer starts to count down even though the app is behind the lock screen. Other devices don't call Activity_resume until the lock screen is unlocked.

Any ideas on how to handle this? I wouldn't be that concerned about it, but Samsung apps won't approve an update on my app until this is fixed.

Best regards,
Jack