Thanks for letting us know your difficulties using your Samsung Galaxy A34 camera ultra wide lens with flash.
Before you try out the below recommendations as to your solution, be sure to check if your device's software are updated with the latest version. Please check how to update your mobile device's software in the following order.
Step 1. Go to Settings > Software update.
Step 2. Tap on Download and install.
Step 3. Follow the on-screen instructions.
If that doesn't fix the problem, you may submit an error report through the Samsung Members app as follows:
Step 1. Long press Samsung Members icon on Apps screen and tap Error reports.
Step 2. Tap OK on agreement popup to send system log data.
Step 3. Select Symptom category "Camera".
Step 4. Describe the problem in details and SEND.
Should you need further assistance and guidance, you may contact us via our online Samsung Customer Care support channels below.