We would like to apologize about the frustrated issue you're going through. Kindly try to clear cache the TikTok app from the settings > apps > choose the app > storage > clear cache. Also, kindly try to reset all the settings from the settings >General/ General management> Reset > Reset all settings. if the issue still exists kindly feel free to call Samsung to be able to check the case remotely. https://www.samsung.com/ae/info/contactus/
