Saurabh As I understand the sensitivity of your time so I put my request in a concise way.
Store app, delivery app push notifications are working fine but the "### apps automatically close in the background after few hours" result in no push notifications.
Note: All tested phone are on complete optimization setting as per dontkillmyapp.com.
Vendors, mangers, delivery boy and other team member reported the same after two weeks of using the apps.
I request you to please consider.