I can be typing a message whether it be normal messaging or on WhatsApp and all of a sudden the spelling will go silly and not spell things correctly so i have to restart my phone. I've had this problem on the S10+ and now on my S21 Ultra. Any1 had the same issues or any1 that has a solution? TIA
Sounds like an issue with the native keyboard. Locate it via: SETTINGS / APPS / KEYBOARD (either Samsung, or Google, or both keyboard settings) - uninstall both keyboards. Restart your phone, reinstall the keyboard(s), and see if this has now fixed the issue.