Try a wipe cache partition, often can help with issues after software updates.
Turn off the device. Plug into a PC, TV, console or another device. Then, enter recovery mode by pressing and holding the volume up and side buttons until the Samsung logo appears. Navigate to "Wipe cache partition" using the volume buttons and select it with the side button. Confirm by selecting "Yes". Once complete, select "Reboot system now" to restart your phone.
https://eu.community.samsung.com/t5/galaxy-a-series/one-ui-7-a16/td-p/12304145One ui 7 might be the next update.