Go to storage and clear cache and data then do it again and see. Hopefully it will not behave like this. Also have a look on Google play store if there is any new update for the same.
I had the same issue for the past 24 hours. It seems to be a problem with Android Webview. I tested my phone. When it was not doing anything, it was fine. Only browsing the internet, watching something caused hang-freeze-reboot event.
Go to Play store -> Search for android Webview -> Uninstall Try using the phone then. I have tried to cause the issue but since doing the uninstall, it is working fine.
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Please follow this path to register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).
Note. please attach the error log file within 15 minutes of the error occurred.
