We are sorry to hear about your experience with the recent updates on your Samsung Galaxy A51 having issues with full CPU usage, and we apologize for the inconvenience it caused you.
You may 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".
Step 4. Describe the problem in details and SEND.
If the problem persists, immediately bring your device to the nearest Samsung Authorized Service Center. Rest assured that our Samsung engineers and technicians are competent to assess your device, offer suggestions, and provide prompt solutions to restore it to optimum performance.
For more assistance and guidance, you may contact us via our online Samsung Customer Care support channels below.
@clayyons... The translucent bar you see is an indication of whether your phone is plugged in or not (see the lightning and power symbols). CPU usage should look like a line graph similar to my pic attached here.