I have TP-Link's Netffos X9 and from the very beginning I noticed a weird thing. Each application or activity is always started as brand new. Always, no matter, if I saw or was using given app just like 5 minutes ago, I see loader screen and a home / startup screen, instead of the one, which I left off.
I've been using around a dozen different mobile devices with Android 8.1 and hundreds other with other (older) versions of Android and this is the first time I see such a weird situation.
I have enabled Developers Options and tripple-checked that option Don't keep activities / Destroy every activity as soon as the user leaves it is disabled. I have also checked that a few applications in topic are listed among Developers options > Inactive apps as active. And yet, each time I start it up, they seems to be starting up as freshly new, showing welcome / home / startup screen.
Does anyone have any idea what is going on and how to prevent such behavior?