We are sorry to hear about your experience with the recent updates on your Samsung Galaxy A50s having issues with acting weird, not taking fingerprints, and having gray screen on display. And with that, we apologize for the inconvenience it caused you.
Submit an error report through 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 "Settings/System" and "Display".
Step 4. Describe the problem in details and SEND.
How to submit an error report on Samsung Members app? | Samsung PH
Clear Cache Partition.
Step 1. Turn off your phone.
Step 2. Plug in the USB cable via PC or Type-C earphones (in case its USB-C to USB-C).
Step 3. Then press and hold Power and Volume up buttons.
Step 4. Release the power button. When the recovery screen shows up, release the volume up button.
Step 5. Navigate to and select Wipe cache partition (Volume up and down is for highlighting options and power is to select).
Step 6. Navigate to and select Yes.
Step 7. Press the power button to select Reboot system now.
For more help and assistance, you may contact us via our online Samsung Customer Care support channels below.