Morning guys, want to ask.. currently using vivo v11i.. but i noticed some apps notification are not showing or delay in showing... e.g after 1 hour its show or pop up.

1) Whatsapp business incoming message will not showing if not open the apps. if using data also same

2) shoppe notification are delay but if using data no problem.

3) few other apps that need to be open 1st then the notification will showing

i have go through the apps setting whatsoever but seems cant fix it

maybe its blocking by battery saver
check your battery saver mode settings

already done that.. have allow apps running background, but still happen