Just an FYI that I'm using an unlocked S20+ that has not yet received Android 11 / One UI 3 with Microsoft Launcher and have been experiencing this since the last security update so I don't think this is Android 11 issue.
facing same issue on S20+ on android 11.
I'll add more context to issue .. if you wait for a second on home screen after closing an app then this issue won't happen. But as soon as you closed an app and touch the screen home screen flashes for once.
Yes this is very annoying this happens when i close all recent apps. It seems that one ui resets the default launcher. If you go to settings-apps-default apps, the home app is set to none. Even if i set my 3rd party launcher as the default it resets it after some time. I'm on android 10 oneui 2.5 using smart launcher. Samsung please fix this soon.
Side note. Huawei smartphones with China rom can't set 3rd party launchers as well. Please don't be huawei
I have this problem after upgrading to UI 3.0 Android 11 using gestures and Nova Launcher. Extremely frustrating. Does Samsung actually look at this community? How do we know if they see this and are taking action to fix it? Turned my 1000+ phone into trash.