Dear Samsung Software Engineers & Developers,
I updated my Galaxy S9 to September 2020 patch through OTA. There is one serious bug introduced in the past 2 updates. The screen flickering bug. This bug triggers every time I turn the screen off and immediately turn it back on. Another way to trigger this bug is to make a phone call, then cover your hand over the sensor so the screen turns off, then remove your hand immediately, then the scree turns on with flickering looking colors. You have to turn the screen off and then on fast.
FYI, I bought my phone from Xfinity Mobile, unlocked it, and transfer it over to AT&T. I applied the AT&T OTA update yesterday and I ran into those problems.
Please send this bugs report to the correct department and have them release EMERGENCY updates for this phone. My phone model is SM-G960U.