Please tell us some basic information before asking for help:
Model Name: Asus Max Shot ZB634KL
Firmware Version: WW-16.14.2002.291
Rooted or not: Not
Frequency of Occurrence: Ever
APP Name & APP Version (If your issue relates to the app): All apps in background
I always multitask on my phone. I open app-A, click the left button to see all of my running apps, open up app-B, and so on.
A while ago (to be honest, only on Android 9), my apps would restart whenever I go back to them, even though they are running in the background. Sometimes they don't restart, but more often than not, the restart as if I am opening the app for the first time.
Before, I could handle it but now it's just gotten so annoying. Especially if I am using a map app and switching between apps to copy the address or information down - just to go back to the map app and see it reset and having to write the info down all over again.