One UI 4 upgrade.

[Dubsy384]

Has anyone else suffered screen lock since this upgrade.. I turn the device on but cannot open any app until I minimise the screen and then maximise it ( the three III at the bottom of the screen) then I can't clear the apps until I do the same.. this has happened with both my 20 Note and my Tab S7. 

[BandOfBrothers]

The only issue I've had is the predictive text in the Samsung Keyboard glitching @Dubsy384

Have you tried https://www.samsung.com/uk/support/mobile-devices/how-do-i-clear-the-cache-on-my-device/ You may also need   to insert your earphones and or hook up to a laptop. No need to launch anything, just turn it on.

And https://www.samsung.com/uk/support/mobile-devices/how-to-start-my-galaxy-device-in-safe-mode/

Also send any error reports and or feedback to Samsung via the Samsung Members App under the GetHelp section.