Thank you, ayerxn, for sharing your experience here while using your Samsung Galaxy A12, having crash issues with various apps and lagging issues.
You can submit a report of errors through Samsung Members app.
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. Tap "Application" & "Slow device".
Step 4. Describe each problem in details and SEND.
For more assistance, you may contact us on our online Samsung support channels below.