To make matters worse, many Chinese devices just kill everything in the background that’s not on a hard coded whitelist.

Looking at Xiaomi’s Miui here. My last phone was a Xiaomi one and it was great. It didn’t take long for me to install LineageOS on it tho because Miui is horrible. It killed every app you had opened the second you switched to another one. Things like email verification codes were literally impossible to enter into an app because when you went into your mail app, copied the code and then went back into the app you wanted to enter it in, that app would have to start up again because it was already killed in the background.

Also, Miui itself used up like half my RAM without anything being opened and it was buggy as hell.