I was just update my phone (s23 ultra) to UI 6.1 and upon completion, my phone is now charging incredibly slowly and display got darker (low brightness). My friend has reported she is having the same issue with a different Samsung phone after his updated as well. I have had fast charging disabled since I got the phone and have never had issues with the charge speed until it forced this awful update.
When is this going to be fixed? This is completely unacceptable for such an expensive product.
I have the same device, but I never got the chance to charge the phone yet. Will keep you posted if I happen to notice the same issues you highlighted here 😬. However, they might probably fix this with the April Security patch update.
