Hi @Fleeceboy best to send error report via Members app if you have not done so already. However advisable firstly to clear the cache partition. I will list the steps here for benefit of any Members who may be unaware.
- Turn off the device.
- Connect To Computer or plug in USB-C Headphones , Press and hold the Volume Up key and then press and hold the Power key (plus Bixby Key if phone has one)
- When the Android logo displays, release all three keys.
- An 'Installing system update' message will show for 30 - 60 seconds before the Android system recovery menu options appear.
- Press the Volume down key several times to highlight wipe cache partition.
- Press Power key to select.
- Press the Volume down key to highlight yes, them and press the Power key to select.
- When the wipe cache partition is complete, Reboot system now is highlighted.
- Press the Power key to restart the device.
If this does not fix the issue you may need to perform a Factory Reset (vital to back up Data beforehand though) which worked well for @RichardOldroyd .
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.